antisaWiki - wiki

access_device_different_subnet_mikrotik

Anonymous (anonymous@undisclosed.example.com) — 2025-07-09T18:05:05+00:00

networking mikrotik subnets Access device on different subnet on Mikrotik Example setup: Remove ether2 interface from the bridge, Bridge > Ports. On ether2 interface add 192.168.1.101/24 address (if not taken), IP > Addresses. Add masquerading for that interface under IP > Firewall > NAT

access_host_services_docker_without_using_network_mode

Anonymous (anonymous@undisclosed.example.com) — 2025-09-19T12:21:48+00:00

docker networking Access host services from docker without using 'host' network mode If you need access for example to a DB running on host from docker container while still using the bridge (default) network mode, start the container with following flag: In docker run:

access_ubuntu_18_04_via_vnc_windows_machines

Anonymous (anonymous@undisclosed.example.com) — 2021-04-14T09:19:02+00:00

vnc remote windows Access Ubuntu via vnc from windows machines sudo gsettings set org.gnome.Vino require-encryption false Tested on * Ubuntu 18.04 See also References *

activate_python_virtual_environment_terminator

Anonymous (anonymous@undisclosed.example.com) — 2020-12-10T15:47:11+00:00

terminal python Activate python virtual environment in Terminator Command Paste this in Terminator's Preferences > Layouts > Custom command bash --rcfile <(cat ${HOME}/.bashrc; echo 'export PROMPT_COMMAND="source ../venv/bin/activate; unset PROMPT_COMMAND"') -i Tested on

adding_config_keys_pulumi

Anonymous (anonymous@undisclosed.example.com) — 2025-03-21T14:15:06+00:00

pulumi iac Adding config keys in Pulumi If you want to use a config from different imported environments in a different project, you need to create a key called exactly “pulumiConfig” in your stack. Example in project A you have a Pulumi.staging.yaml file with some configs:

adding_openvpn_users

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T07:33:34+00:00

vpn openvpn Add VPN users Create new user adduser --no-create-home --shell /bin/false vpnuser Assign vpn ip address Inside of /etc/openvpn/ccd/ add new file with same name as user's name (“vpnuser” in this example) and next 2 ip adresse which are not used from this table

add_additional_ip_address_interface

Anonymous (anonymous@undisclosed.example.com) — 2026-01-15T18:41:14+00:00

networking routing ipv4 Add additional ip address on interface First make sure the interface is up: ip link set eth0 up then add an address: ip addr add 94.130.84.168/27 dev eth0 /etc/network/interfaces example (for persistence over reboot): root@server ~ # cat /etc/network/interfaces ### Hetzner Online GmbH installimage source /etc/network/interfaces.d/* auto lo iface lo inet loopback iface lo inet6 loopback auto eno1 iface eno1 inet static address 94.130.84.168 netmask 255.255.255.1…

add_bridge_lxc

Anonymous (anonymous@undisclosed.example.com) — 2022-09-28T09:23:34+00:00

networking lxc Add bridge for lxc cmd lineu: brctl addbr br0 ip link set up dev br0 ip addr add dev br0 10.10.10.1/24 /etc/network/interfaces auto br0 iface br0 inet static address 10.10.10.1 netmask 255.255.255.0 bridge_ports none bridge_fd 0 bridge_stp off bridge_maxwait 5 pre-up /sbin/brctl addbr br0

add_dkim_dmarc_exim4_mta

Anonymous (anonymous@undisclosed.example.com) — 2022-10-05T14:18:36+00:00

mail Add DKIM and DMARC to exim4 MTA Create keys openssl genrsa -out dkim.private.key 1024 openssl rsa -in dkim.private.key -out dkim.public.key -pubout -outform PEM Check what configuration type is being used grep "db_use_split_config" /etc/exim4/update-exim4.conf.conf

add_dotenv_env_file_github_action

Anonymous (anonymous@undisclosed.example.com) — 2025-02-17T14:18:33+00:00

github dotenv js cicd Add dotenv (.env) file in Github action Instead of creating variables one by one in GH action like so: - name: 'Create env file' run: | touch .env echo API_ENDPOINT="https://xxx.execute-api.us-west-2.amazonaws.com" >> .env echo API_KEY=${{ secrets.API_KEY }} >> .env cat .env

add_new_nagios_check_remote_host

Anonymous (anonymous@undisclosed.example.com) — 2024-09-19T11:11:14+00:00

nagios monitoring nrpe Add new nagios check on remote host Make sure you have nrpe installed on remote host. Add the new service in /usr/local/nagios/etc/services/my_checks.cfg 1. Example adding of inodes check: define service{ use generic-service hostgroup_name monitored-hosts service_description Check system inodes check_command check_nrpe!check_disk_inodes servicegroups sysser…

add_new_nagios_check_server

Anonymous (anonymous@undisclosed.example.com) — 2023-02-03T15:43:42+00:00

nagios monitoring Add new check on localhost (nagios itself) 1. Define new command in /usr/local/nagios/etc/commands/ define command { command_name check_my_service command_line $USER1$/check_http -H example.com -u "http://example.com/health/someapi/" -a : }

add_ssh_agent_key

Anonymous (anonymous@undisclosed.example.com) — 2022-09-28T09:26:08+00:00

ssh Add ssh-agent for ssh-key In .bashrc: SSH_ENV="$HOME/.ssh/environment" function start_agent { echo "Initialising new SSH agent..." /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}" echo succeeded chmod 600 "${SSH_ENV}" . "${SSH_ENV}" > /dev/null /usr/bin/ssh-add -t 432000 ; } if [ -f "${SSH_ENV}" ]; then . "${SSH_ENV}" > /dev/null ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || { start…

add_static_vpn_ip_address_client_mikrotik

Anonymous (anonymous@undisclosed.example.com) — 2021-06-02T10:15:34+00:00

vpn mikrotik networking Add static VPN IP address for client on Mikrotik Under PPP > Secrets > select client and set “Remote address” to fixed IP from vpn subnet. Tested on * Mikrotik RouterOs 6.47.9 See also * Mikrotik OpenVPN setup References

add_status_line_screen

Anonymous (anonymous@undisclosed.example.com) — 2021-06-04T08:41:49+00:00

screen Add status line to screen Add the following to your ~/.screenrc and you'll see a status line down the bottom, showing in inverted text the date, time and system load. More escape codes found in man page link below. Look 1 hardstatus alwayslastline hardstatus string '%{= wb} You are in screen %n @ %H %S %{-}||| %Y-%m-%d %c | %l '

allowing_cors_requests

Anonymous (anonymous@undisclosed.example.com) — 2024-10-14T14:42:44+00:00

cors nginx Allowing CORS requests In order to allow requests from browser from one domain to another you need to allow CORS either in the webserver config or in the app itself. For simple requests like GET allowing headers should work fine, but for preflighted requests you need to first respond with

ampache_installation

Anonymous (anonymous@undisclosed.example.com) — 2025-08-15T09:21:39+00:00

music Ampache installation Docker Follow the readme which should work. When visiting the webui setup, you must create a new database user with some password otherwise then next step of creating configs will fail due to this bug. If you need access to a NAS share make sure the www-data user has read/write permission on the NAS server. Here's an example from Openmediavault.

ansible_debug_all_variables

Anonymous (anonymous@undisclosed.example.com) — 2024-06-10T09:06:06+00:00

ansible Ansible debug all variables Add this to playbook and comment any roles mentioned there. tasks: - name: Print some debug information vars: msg: | Module Variables ("vars"): -------------------------------- {{ vars | to_nice_json }} Environment Variables ("environment"): -------------------------------- {{ environment | to_nice_json }} GROUP NAMES Variables ("group_names"): --…

ansible_debug_one_variable

Anonymous (anonymous@undisclosed.example.com) — 2023-12-18T14:35:08+00:00

ansible Ansible debug one variable - name: Debug the foo variable debug: var: "foo" Debug nested variable - name: Debug nested variable debug: var: "foo['test1']['what']" Tested on * ansible 2.8.20 See also * Debug all variables * ansible troubleshooting References

ansible_playbook_examples

Anonymous (anonymous@undisclosed.example.com) — 2024-11-19T10:04:51+00:00

ansible ansible playbook examples * [Count Docker containers and execute tasks and/or roles on host with fewer containers ] * [Run playbook only on hosts where variable is greater than] * [Add word to a line idempotently] Tested on * ansible [core 2.16.4] * Ansible community version 9.3.0 See also * Ansible debug all variables References *

ansible_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-10-23T09:48:25+00:00

ansible troubleshooting ansible troubleshooting undefined variable atal: [10.21.21.11]: FAILED! => msg: |- Th…

apache_rewrite_hints

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:08:35+00:00

webserver apache Apache rewrite hints Location of rewrite rules When writing rewrite rules, take care where they are defined. According to documentation leading forward slash does not match in per directory contexts (.htaccess files and blocks). The following will work for example in vhost file, but not in .htaccess file.

apache_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-09-17T12:15:21+00:00

apache httpd troubleshooting apache troubleshooting Can't proxy server For some reason you can't access proxied server on localhost address and get an error like: [Wed Sep 17 13:50:40.031673 2025] [proxy:error] [pid 12350:tid 139861767968512] (13)Permission denied: AH00957: HTTP: attempt to connect to 127.0.0.1:3002 (127.0.0.1) failed [Wed Sep 17 13:50:40.031875 2025] [proxy:error] [pid 12350:tid 139861767968512] AH00959: ap_proxy_connect_backend disabling worker for (127.0.0.1) for 60s [Wed …

api

Anonymous (anonymous@undisclosed.example.com) — 2020-11-28T13:49:39+00:00

Atlassian Server REST API examples Bitbucket Cloud API steps Bitbucket Server API steps Set Github status from Bamboo

apt_get_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-03-18T10:13:03+00:00

apt apt-get troubleshooting apt-get troubleshooting Failed to update apt cache: E:Release file for http://security.debian.org/debian-security/dists/bullseye-security/InRelease is not valid yet (invalid for another 7h 31min 19s). Full error: msg: 'Failed to update apt cache: E:Release file for http://security.debian.org/debian-security/dists/bullseye-security/InRelease is not valid yet (invalid for another 7h 31min 19s). Updates for this repository will not be applied., E:Release file for ht…

artificial_load_web_page

Anonymous (anonymous@undisclosed.example.com) — 2022-09-28T09:29:31+00:00

apache testing Artificial load on web page sudo apt install apache2-utils Send 500 requests at one time 10000, total requests ab -c 500 -n 10000 https://example.com Tested on * See also References

atlassian_apps_aws_testing_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2026-01-14T15:25:14+00:00

troubleshooting atlassian Atlassian apps AWS testing troubleshooting Error: timed out waiting for the condition module.confluence[0].helm_release.confluence: Still modifying... [id=confluence, 34m58s elapsed] module.confluence[0].helm_release.confluence: Still modifying... [id=confluence, 35m8s elapsed] module.confluence[0].helm_release.confluence: Still modifying... [id=confluence, 35m18s elapsed] Error: timed out waiting for the condition with module.confluence[0].helm_release.confluen…

atlassian_server_rest_api_examples

Anonymous (anonymous@undisclosed.example.com) — 2020-12-14T09:10:34+00:00

atlassian bamboo api Atlassian Bamboo API Example for Atlassian Bamboo, running on port 8085. Get list of all plans curl -s -H “Content-Type:application/json” -H “Accept:application/json” -u user:pass -X GET | jq Get plan info curl -s -H “Content-Type:application/json

automatically_sync_folders_outlook_365_thunderbird

Anonymous (anonymous@undisclosed.example.com) — 2021-11-13T22:06:47+00:00

outlook mail thunderbird sync desktop Automatically sync folders from Outlook 365 in Thunderbird Without this, you need to select each folder separately to get new emails. This will automatically sync them. Go to Thunderbird Preferences and search for “Config Editor”. Find the mail.server.default.check_all_folders_for_new

avoid_upstream_not_found_nginx_using_only_one_server

Anonymous (anonymous@undisclosed.example.com) — 2023-04-18T10:34:03+00:00

nginx docker Avoid upstream not found in nginx when using only one upstream server If you have a situation where there is only one upstream that you need to proxy_pass, use a variable in the proxy_pass directive, e.g. server { listen 80; resolver 127.0.0.11 valid=30s; # docker's resolver set $target "http://target-host:3005"; # variable definition location / { proxy_pass $target; } }

awk_commands

Anonymous (anonymous@undisclosed.example.com) — 2021-10-27T07:15:06+00:00

awk commands cli awk commands Show how many requests per minute the server received cat /var/log/nginx/access.log | awk -F ':' '{print $2":"$3}' | sort | uniq -c Tested on * Debian 10 * nginx See also * Openssl commands References

aws_cli_2fa

Anonymous (anonymous@undisclosed.example.com) — 2024-12-29T14:05:54+00:00

aws cli 2fa mfa terminal AWS CLI with 2FA If 2FA is enabled on your AWS account, in order to use aws cli command from terminal you need to get the fresh credentials. First get the arn: aws iam list-mfa-devices --user-name meandmyself Then get the creds: aws sts get-session-token --serial-number arn-of-the-mfa-device --token-code code-from-token

aws_cli_commands

Anonymous (anonymous@undisclosed.example.com) — 2025-03-26T14:36:51+00:00

aws cli bash cloud aws cli commands List all active load balancers v2 (Application and Network Load Balancers) for region in $(aws ec2 describe-regions --query "Regions[*].RegionName" --output text --region eu-central-1); do echo "Region: $region"; aws elbv2 describe-load-balancers --region "$region" --query "LoadBalancers[*].{Name:LoadBalancerName,DNS:DNSName}" --output table; done

aws_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-03-05T11:57:58+00:00

aws cloud troubleshooting aws troubleshooting Instances failed to join the kubernetes cluster Usually caused by the worker nodes not being able to contact the API server on the control plane. Things to check: * Check the “Cluster security group” and “Additional security groups

aws_vpc_peering

Anonymous (anonymous@undisclosed.example.com) — 2025-03-07T09:09:33+00:00

aws cloud vpc aws vpc peering If you need to have 2 different vpc-s (from same or a different account) to be able communicate, you need to make sure that their subnets do not overlap otherwise the you will not be able to set up the route tables. General approach is to:

backup_elasticsearch_indices

Anonymous (anonymous@undisclosed.example.com) — 2022-02-18T12:28:44+00:00

backup elasticsearch Backup Elasticsearch indices Below should work on bare metal and inside ES docker installation. The snapshots are done using the ES API. Raw system file backups won't work. Test below was done via docker on Debian 11 provisioned by Vagrant. Add path repo where the snapshots will be restored

backup_samba_share_back_time

Anonymous (anonymous@undisclosed.example.com) — 2021-05-13T13:57:42+00:00

backup samba Backup on samba share (back in time) Find gvfs mount /run/user/1000/gvfs/smb-share\:server\=192.168.190.110\,share\=user/home_folder_backup/ Tested on * See also References

bash_commands

Anonymous (anonymous@undisclosed.example.com) — 2024-07-22T10:32:51+00:00

bash Bash commands Remove first character: for f in *; do mv "$f" "${f:1}"; done Add 8 to filename: for f in *; do mv "$f" "8$f"; done Sort folders by disk usage, larger first: du -sh /* | sort -hr Checksum directory recursively find /var/lib/mysql -type f -print0 | xargs -0 sha256sum > mysql.sha256sum

bgp_ip_transit_info

Anonymous (anonymous@undisclosed.example.com) — 2026-04-13T09:46:19+00:00

ip bgp networking asn ripe arin subnet anycast bgp ip transit info Getting your IPs from RIPE/ARIN etc. takes a lot of time and back and forth. Prepare at least for a month if you need to wait for someone else to transfer the IPs to you. The obtained subnet can be advertised from your server(s) via

bitbucket_cloud_api_steps

Anonymous (anonymous@undisclosed.example.com) — 2021-02-19T14:20:38+00:00

atlassian bitbucket api Bitbucket Cloud API steps Get oauth token curl -X POST -u "email:password" \ https://bitbucket.org/site/oauth2/access_token \ -d grant_type=client_credentials curl -sX POST -u "AUTHOKEN" https://bitbucket.org/site/oauth2/access_token -d grant_type=client_credentials {"access_token": "YOUR_LONG_ACCESS_TOKEN", "scopes": "pullrequest:write project:write account:write issue:write pipeline:variable snippet:write team:write webhook reposi...

bitbucket_server_api_steps

Anonymous (anonymous@undisclosed.example.com) — 2021-02-19T14:21:08+00:00

atlassian bitbucket api Bitbucket Server API steps Get projects curl -u user:pass -X GET -H "Content-Type: application/json" http://localhost:7990/rest/api/1.0/projects | jq . Get the pull requests for repo "EXAM" curl -u user:pass -X GET -H "Content-Type: application/json" http://localhost:7990/rest/api/1.0/projects/EXAM/repos/cloud/pull-requests/ | jq .

bitbucket_server_cloud_migration_github_integration

Anonymous (anonymous@undisclosed.example.com) — 2021-01-15T10:47:12+00:00

jira github bitbucket Bitbucket Server Cloud migration with Github integration Add Github repository to Jira server instance. Github repo can be added globally via Administration > Applications > DVCS accounts. This will enable the repo for all future projects. Alternatively it can be added separately for each projects in Project Settings > Developer tools.

block_google_sign_popup_web_pages

Anonymous (anonymous@undisclosed.example.com) — 2025-01-01T10:01:54+00:00

google login popup ublock adblock Block google sign-in popup on web pages uBlock Origin Add ||accounts.google.com/gsi/*$xhr,script,3p to My Filters. Tested on * Ubuntu 22.04.05 LTS * uBlock Origin 1.61.2 See also References *

boot_debian_8_jessie_extlinux_bootloader_instead_grub

Anonymous (anonymous@undisclosed.example.com) — 2022-09-28T09:37:24+00:00

debian bootloader Boot Debian 8 Jessie with extlinux bootloader instead of GRUB Remove GRUB and install extlinux: apt purge grub-pc grub-common grub-pc-bin grub2-common && rm -rf /boot/grub/ && apt install extlinux syslinux-common If /boot is not on separate partition:

borgbackup_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-02-07T09:38:33+00:00

backup borg Borg backup commands Init repo On (Synology 415) NAS share : BORG_REPO=ssh://user@syn415.local:22/~/borg_backup && borg init --encryption=keyfile $BORG_REPO List backups BORG_REPO="/path/to/backup" borg list Mount backup to temporary directory backup_name is the first column from list above

can_get_desktop_due_fstab_misconfiguration

Anonymous (anonymous@undisclosed.example.com) — 2023-06-05T09:30:25+00:00

fstab mount Can't get to desktop due to fstab misconfiguration If you have drives in /etc/fstab which are not accessible you probably won't get to desktop. Here is an error with following fstab configuration: ... # /dev/mapper/vgubuntu-root / ext4 errors=remount-ro 0 1 # /boot was on /dev/nvme0n1p2 during installation UUID=e63f81ad-f3d5-40a8-82f1-e4b7e4c31c92 /boot ext4 defaults 0 …

cdn77_caching_info

Anonymous (anonymous@undisclosed.example.com) — 2023-02-09T10:03:12+00:00

cdn cache CDN77 caching info CDN doesn't share a cache between locations. That means that every location has its own cache built after the users fetch the files on that location. If you want to force all locations to fetch the files at the same time you need to use the prefetch.

certbot_download_certificates_only

Anonymous (anonymous@undisclosed.example.com) — 2022-09-19T21:42:10+00:00

letsencrypt ssl Certbot download certificates only Install certbot Install certbot via manual method Get certificate Append –dry-run to below commands to test. certbot-auto certonly --webroot -w /path/to/webroot/ -d sub.example.com Concatenate the newly renewed certificate and private key (lighttpd example):

certbot_installation

Anonymous (anonymous@undisclosed.example.com) — 2026-03-27T11:27:16+00:00

ssl letsencrypt Install certbot via manual method Debian 9 and older wget https://dl.eff.org/certbot-auto &&\ mv certbot-auto /usr/local/bin/ &&\ chown root:root /usr/local/bin/certbot-auto &&\ chmod 0755 /usr/local/bin/certbot-auto Debian 10 and later See certbot installation CentOS 7

certbot_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-06-12T08:29:57+00:00

certbot letsencrypt ssl troubleshooting Letsencrypt certbot troubleshooting * certbot first establishes connection over ipv6. If you are getting timeout errors check firewall for ipv6 https access or set network stack to prefer ipv4 over ipv6. Also remove the AAAA record for your domain if you don't want it to connect over IPv6.

change_author_email_history_retroactively

Anonymous (anonymous@undisclosed.example.com) — 2021-03-29T14:21:54+00:00

git Change git author and email in history retroactively Before executing the script, set your user.name and user.email git config parameter properly! This changes SHA1s, so take care when using it on a branch that has already been pushed. First stash any unstaged changes

change_crontab_default_editor

Anonymous (anonymous@undisclosed.example.com) — 2021-05-18T09:25:22+00:00

crontab cron Change crontab default editor Remove “.selected_editor” file in users home directory rm .selected_editor Edit crontab crontab -e then select vim! Tested on * Debian 9 See also References

change_default_sound_device

Anonymous (anonymous@undisclosed.example.com) — 2022-09-28T09:45:42+00:00

sound archlinux audio Change default sound device Add alsa-base.conf sudo vi /etc/modprobe.d/alsa-base.conf with this content: options snd_hda_intel enable=1 index=1 options snd_hda_intel enable=1 index=0 Indexes can be found here: cat /proc/asound/cards Tested on *

change_disk_software_raid

Anonymous (anonymous@undisclosed.example.com) — 2022-10-17T12:39:08+00:00

raid hardware Change disk in software raid First find out what partition table you have with # gdisk -l /dev/nvme1n1 GPT fdisk (gdisk) version 1.0.1 Warning: Partition table header claims that the size of partition table entries is 1153912944 bytes, but this program supports only 128-byte entries. Adjusting accordingly, but partition table may be garbage. Warning: Partition table header claims that the size of partition table entries is 0 bytes, but this program supports only 128-byte en…

change_privileged_unprivileged_container

Anonymous (anonymous@undisclosed.example.com) — 2021-04-01T12:38:07+00:00

lxc virtualization containers proxmox Change privileged to unprivileged container in Proxmox In Proxmox add this to /etc/pve/lxc/container_number.conf (mount.entry was added for openvpn) unprivileged: 1 lxc.mount.entry: /dev/net dev/net none bind,create=dir lxc.idmap = u 0 100000 65536 lxc.idmap = g 0 100000 65536

change_resolution_debian_7_kvm

Anonymous (anonymous@undisclosed.example.com) — 2022-09-19T21:55:39+00:00

debian vm Change resolution of Debian 7 in KVM Open up /etc/default/grub with superuser privileges: sudo vi /etc/default/grub Uncomment/add the following lines: GRUB_GFXMODE=1024x768x32 GRUB_GFXPAYLOAD_LINUX=keep Run update-grub as superuser: sudo update-grub.

change_terminal_resolution_raspberry_pi

Anonymous (anonymous@undisclosed.example.com) — 2025-04-08T15:25:16+00:00

rpi rpi4 raspberry_pi resolution Change terminal resolution on Raspberry Pi You need to edit the /boot/firmware/cmdline.txt. If you want 1920×1080 output on HDMI-1 add video=HDMI-A-1:1920x1080M@60 to that file. Example: root@rpi4b@~# cat /boot/firmware/cmdline.txt video=HDMI-A-1:1920x1080M@60 console=serial0,115200 console=tty1 root=PARTUUID=9254db70-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cfg80211.ieee80211_regdom=US

change_ulimits_on_unprivileged_containers

Anonymous (anonymous@undisclosed.example.com) — 2021-04-01T12:40:48+00:00

lxc virtualization containers proxmox Change ulimits on unprivileged containers If you get this error for example when starting lighttpd inside unpriv. cont.: Starting web server: lighttpd2018-04-05 13:42:53: (server.c.751) couldn't set 'max filedescriptors' Operation not permitted Add

change_windows_username

Anonymous (anonymous@undisclosed.example.com) — 2021-06-02T07:43:18+00:00

windows Change Windows username Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur. 1. Log in by using another administrative account.

check_systemd_service_running_via_zabbix

Anonymous (anonymous@undisclosed.example.com) — 2026-03-11T11:32:37+00:00

monitoring systemd zabbix Check if systemd service is running via Zabbix Zabbix version 4.0.39 Firstly the zabbix agent running on the server must be allowed to execute remote commands, so update your zabbix_agentd.conf by setting EnableRemoteCommands=1 Restart zabbix agent.

clone_remote_ansible_git_module_using_ssh_key

Anonymous (anonymous@undisclosed.example.com) — 2022-03-14T13:34:48+00:00

git ansible ssh Clone remote repository with ansible git module using ssh key You can use your ssh agent to forward the keys to the remote server, however when running ansible on one remote host and deploying to another, for example when triggering ansible from a Rundeck job easiest is to copy the private key file on the remote host. e.g. in the playbook add task

code_snippets

Anonymous (anonymous@undisclosed.example.com) — 2020-11-28T16:47:33+00:00

Kivy recycle view 1

combine_multiple_image_files_one_file

Anonymous (anonymous@undisclosed.example.com) — 2024-04-06T08:41:07+00:00

images jpeg png Combine multiple image files into one file convert Screenshot\ from\ 2024-01-20\ 12-5* -append combined.png Tested on * See also References

comment_uncomment_hosts_file_gnome_shell_panel

Anonymous (anonymous@undisclosed.example.com) — 2023-05-31T13:14:17+00:00

gnome hosts desktop extension Comment/uncomment hosts file from gnome shell panel Install argos In .config/argos/hosts.10s.sh add this: #!/usr/bin/env bash R="hosts" echo "$R" echo "---" echo "host01 | iconName=help-faq-symbolic terminal=true bash='switch_host.sh 01'" echo "host02 | iconName=help-faq-symbolic terminal=true bash='switch_host.sh 02'" echo "host03 | iconName=help-faq-symbolic terminal=true bash='switch_host.sh 03'" echo "RESET | iconName=help-faq-symbolic terminal=true bash=…

compress_decompress_files_faster

Anonymous (anonymous@undisclosed.example.com) — 2023-04-23T19:24:58+00:00

gzip compression Compress or decompress files faster Instead of gzip try bgzip. On Ubuntu install with sudo apt-get install tabix Example decompression of 161.7 GB file to 512.1 GB with 8 threads : time bgzip -d --threads 8 win1_nvme01n1.img.gz real 70m56,540s user 15m50,506s sys 4m26,017s

configure_exim4_bypass_local_mail_delivery

Anonymous (anonymous@undisclosed.example.com) — 2021-03-11T12:14:25+00:00

mail exim4 Configure exim4 to bypass local mail delivery If you will be receiving email via Google mail and have a custom domain registered with them e.g. yourdomain.com, but that domain is also pointing to your server then you need to setup a hubbed host on your server to properly receive mail sent from your server at smth@yourdomain.com. The server (exim) needs to know that

configure_mikrotik_router_wifi_repeater

Anonymous (anonymous@undisclosed.example.com) — 2025-11-30T14:23:08+00:00

mikrotik wifi Configure Mikrotik router as wifi repeater First reset the repeater router (RR) to factory settings. You should now plug the RR to your PC and access it via Winbox software. Username is admin and password is empty. Remember to disable the DNS Server if enabled.

confluence_aws_deploy

Anonymous (anonymous@undisclosed.example.com) — 2023-10-17T09:14:30+00:00

atlassian confluence aws kubernetes Confluence AWS deploy Install prerequisite tooling first. Install Helm helm repo add atlassian-data-center \ https://atlassian.github.io/data-center-helm-charts helm repo update Install cluster Use a more powerful VM in the config first otherwise the pods will complain about the lack of CPU, something like c5.xlarge then run:

confluence_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-05-03T11:16:25+00:00

atlassian confluence troubleshooting Confluence troubleshooting Database "Incorrect isolation level" To resolve “Incorrect isolation level” when trying to test connection to database upon installing add this: [mysqld] ... transaction-isolation=READ-COMMITTED ... to /etc/mysql/mysql.conf.d/mysqld.cnf

connecting_server_kvm_console_via_java

Anonymous (anonymous@undisclosed.example.com) — 2026-01-27T14:13:27+00:00

java idrac kvm ilo Connecting to server KVM console via java If you're having issues connecting to server console because of old java version running on the server via a command like this /usr/lib/jvm/jre1.8.0_361/bin/javaws 'viewer.jnlp(82.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx)'

connect_azure_database

Anonymous (anonymous@undisclosed.example.com) — 2024-05-06T12:45:37+00:00

db microsoft azure cloud database sql Connect to Azure database First download the Azure Data Studio as you need access to master database which you can't see via the Azure portal. Read-only user This is an example for login, you can also use user accounts and couple of other ways. Refer to docs below.

connect_azure_rest_api

Anonymous (anonymous@undisclosed.example.com) — 2023-09-05T09:29:03+00:00

microsoft azure rest api Connect to Azure REST API This uses so-called client credentials grant for accessing the API. There are also authorization via code to get the token mentioned below. In your account open the azure shell. After connecting create the principal az ad sp create-for-rbac --role Contributor --scope /subscriptions/

connect_exchange_online_microsoft_powershell

Anonymous (anonymous@undisclosed.example.com) — 2021-04-11T09:17:54+00:00

powershell microsoft outlook exchange Connect to Exchange Online with Microsoft Powershell Installing Debian package did not work because of error This parameter set requires WSMan, and no supported WSMan client library was found. WSMan is either not installed or unavailable for this system.

connect_k8s_cluster_created_by_atlassian_dc_app_performance_test_suite

Anonymous (anonymous@undisclosed.example.com) — 2026-01-19T14:04:04+00:00

atlassian k8s Connect to k8s cluster created by atlassian dc-app-performance test suite Name of the cluster can be found in the output after you spin up the cluster, something like ... Added new context arn:aws:eks:us-east-2:855054226135:cluster/atlas-dcapt-product-cluster to /data-center-terraform/kubeconfig_atlas-dcapt-product-cluster ...

connect_microsoft_azure_active_directory_atlassian_cloud

Anonymous (anonymous@undisclosed.example.com) — 2021-07-29T14:43:36+00:00

atlassian azure ad microsoft Connect Microsoft Azure Active directory with Atlassian Cloud * Get Atlassian access trial * Verify domain > Claim accounts * User provisioning > Create a directory * Login to Azure, create new directory, add test users * Add custom domain name and verify to AD

connect_multiple_vpns_windows

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T07:23:35+00:00

windows vpn Connect to multiple VPNs on Windows On Windows OpenVPN by default installs one TAP network interface. If you want to connect to multiple VPNs simultaneously you need an interface for each VPN. You can add a additional adapter by a batch file provided by the TAP driver. Open a command prompt with administrative rights and change to the TAP install folder.

connect_samba_ldap_bitbucket

Anonymous (anonymous@undisclosed.example.com) — 2020-12-14T09:25:08+00:00

ldap atlassian bitbucket Connect to Samba with LDAP (Bitbucket e.g.) Get the cert openssl s_client -connect example.com:443 -servername example.com:443 < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > public.crt Insert cert to java keystore (this needs to be done on each bitbucket software update, so change version in path accordingly)

connect_thunderbird_oulook_365

Anonymous (anonymous@undisclosed.example.com) — 2021-05-25T14:58:31+00:00

mail thunderbird outlook Connect thunderbird with Oulook 365 Enable Authenticated SMTP In Microsoft 365 admin center go to Active users > select user > Mail tab > Manage email apps. Thunderbird settings for connecting Outgoing server Server name: smtp.office365.com Port: 587

connect_to_microsoft_azuread_via_powershell

Anonymous (anonymous@undisclosed.example.com) — 2021-04-21T11:39:45+00:00

microsoft powershell azure Connect to Microsoft Azure AD via powershell This is for multifactor authentication. 1. Open Powershell as Admin. 2. Install module: Install-Module MSOnline 3. Connect and check if it is successful Connect-MsolServiceGet-MsolUser You should get a list of users and their emails.

content_security_policy_report_uri_endpoint_python

Anonymous (anonymous@undisclosed.example.com) — 2021-11-12T12:27:52+00:00

csp webbrowser security python reporting Content security policy report uri endpoint in python The content policy can also be enforced in app code. The below is for using the web server to send appropriate headers. This assumes that the python app will run on the same server where the web server is.

control_traffic_by_port_number

Anonymous (anonymous@undisclosed.example.com) — 2021-01-11T13:08:33+00:00

firewall network Control traffic by port number Something like this should do the job, using the connlimit module of iptables. iptables -t filter -I INPUT -p tcp --dport 80 -j ACCEPTiptables -t filter -I INPUT -p tcp --dport 80 -m state \ --state RELATED,ESTABLISHED -j ACCEPT

copy_files_windows_encrypted_disk

Anonymous (anonymous@undisclosed.example.com) — 2025-02-10T14:20:02+00:00

windows raid bitlocker encryption troubleshooting Copy files from Windows encrypted disk * Insert a backup USB drive onto which to copy the files first * Boot the computer and input the Bitlocker key however many times needed (probably 2?) * Get to the windows recovery options, go to Advanced troubleshooting

copy_wordpress_multisite_site_theme_another

Anonymous (anonymous@undisclosed.example.com) — 2021-01-15T15:04:41+00:00

wordpress Copy wordpress multisite site (theme) to another site Wordpress saves the different sites inside wp-content/uploads/sites/ e.g. wp-content/uploads/sites/3/. There are corresponding wp tables in the database e.g. | wp_3_actionscheduler_actions | | wp_3_actionscheduler_claims | | wp_3_actionscheduler_groups | | wp_3_actionscheduler_logs | | wp_3_commentmeta …

create_container

Anonymous (anonymous@undisclosed.example.com) — 2021-04-01T12:42:39+00:00

lxc virtualization containers Create container lxc-create -n -t debian -- -r wheezy Tested on * See also * Change ulimits on unprivileged containers * Moving lxc containers * lxc troubleshooting * Change privileged to unprivileged container in Proxmox References

create_custom_emblem_thunar

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:31:49+00:00

desktop xfce thunar Create custom emblem in Thunar 1. Add png or svg to theme's emblem folder 2. Run gtk-update-icon-cache on theme directory i.e. if you are inside the themes directory which contains index.theme and emblems folder simply run gtk-update-icon-cache . Tested on

create_custom_uri_url_handlers

Anonymous (anonymous@undisclosed.example.com) — 2021-06-04T07:21:25+00:00

desktop bash scripts Create custom URI/URL handlers If you want to be able to open URIs like ssh://user@host from Firefox in Terminal application. Creating the Handlers Make a .desktop file in ~/.local/share/applications. Example ssh-handler.desktop: [Desktop Entry] Type=Application Name=SSH Handler Exec=ssh-handler.sh %u Icon=utilities-terminal StartupNotify=false MimeType=x-scheme-handler/ssh;

create_docker_config_secret_private_image_pulling_pulumi

Anonymous (anonymous@undisclosed.example.com) — 2025-03-06T16:10:33+00:00

pulumi docker secret aws go Create a Docker config Secret for private image pulling in Pulumi ... // Define the GitHub token secret ghTokenSecret, err := corev1.NewSecret(ctx, "ghTokenSecret", &corev1.SecretArgs{ Metadata: &metav1.ObjectMetaArgs{ Name: pulumi.String("github-token-secret"), Namespace: serviceNamespace.Metadata.Name(), }, StringData: pulumi.StringMap{ ".dockerconfigjson": pulumi.String(`{ "auths": { "ghcr.io": { "auth": "

create_lvm_debian_7

Anonymous (anonymous@undisclosed.example.com) — 2025-09-04T12:18:50+00:00

debian lvm Create LVM on Debian 7 apt-get install lvm2etc/init.d/lvm startpvcreate /dev/sdavgcreate myVirtualGroup1 /dev/sdavgdisplay Create a logical volume in a volume group: lvcreate -n myLogicalVolume1 -L 10g myVirtualGroup1 lvdisplay Format the logical volume to the filesystem you want (ext4,xfs

create_postgresql_different_encoding

Anonymous (anonymous@undisclosed.example.com) — 2021-05-19T11:51:20+00:00

postgresql sql database Create postgresql with different encoding CREATE DATABASE mydb WITH ENCODING='UTF8' OWNER=myowner CONNECTION LIMIT=-1 TEMPLATE template0; Tested on * See also References

create_raid_5_4_disks_encryption_hetzner

Anonymous (anonymous@undisclosed.example.com) — 2022-10-17T12:43:02+00:00

raid hetzner Create RAID 5 from 4 disks with encryption on Hetzner Delete the existing logical drive megacli -ldinfo -lall -aall megacli -cfglddel -L0 -a0 Create 2 virtual drives, first 30 GB, second the rest of free space megacli -CfgLDAdd -R5 [252:0,252:1,252:2,252:3] WB NORA Direct CachedBadBBU -sz20GB -strpsz256 -a0 megacli -CfgLDAdd -R5 [252:0,252:1,252:2,252:3] WB NORA Direct CachedBadBBU -strpsz256 -a0

create_selfcontained_python_script

Anonymous (anonymous@undisclosed.example.com) — 2022-12-22T13:12:18+00:00

python Create self contained python script Install pip3 install pyinstaller Go where your script is and execute pyinstaller --onefile yourscript.py You should get one file (named “yourscript”) that can be distributed to other Linux distros and run simply with

create_wordpress_user_directly_database

Anonymous (anonymous@undisclosed.example.com) — 2022-04-07T08:35:58+00:00

wordpress mysql mariadb Create Wordpress user directly in database Run this command mandatory replacing the database, id, use_pass, user_nicename, user_email. Use same values in other 2 commands. INSERT INTO `databasename`.`wp_users` (`ID`, `user_login`, `user_pass`, `user_nicename`, `user_email`, `user_url`, `user_registered`, `user_activation_key`, `user_status`, `display_name`) VALUES ('4', 'demo', MD5('demo'), 'Your Name', 'test@yourdomain.com', 'http://www.test.com/', '2011-06-07 00:00:…

creating_ca_and_signing_server_and_client_certs_with_openssl

Anonymous (anonymous@undisclosed.example.com) — 2024-04-09T12:08:19+00:00

ssl certificates Creating CA and signing server and client certs with openssl Can be used for anything that requires SSL certs, including stunnel certs. For stunnel certs client cert should be concatenated to the CA server file (rootCA.crt below) on the stunnel server.

creating_opensearch_dashboards_users

Anonymous (anonymous@undisclosed.example.com) — 2024-09-05T09:11:35+00:00

elasticsearch kibana opensearch Creating Opensearch Dashboards users This user will only see the dashboards and visualizations and will not have any other access. Make sure that you have set opensearch_security.readonly_mode.roles: ["kibana_read_only"] in /usr/share/opensearch-dashboards/config/opensearch_dashboards.yml

curl_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-05-02T14:10:49+00:00

curl bash curl commands Check if webserver is sending data compressed curl https://example.com/bigcsv.csv --silent --write-out "%{size_download}\n" --output /dev/null curl https://example.com/bigcsv.csv -H "Accept-Encoding: gzip,deflate" --silent --write-out "%{size_download}\n" --output /dev/null

custom_hosts_file_location

Anonymous (anonymous@undisclosed.example.com) — 2021-11-03T10:25:20+00:00

dns hosts bashrc Below works 50% of the time every time! Custom hosts file location Add this to .bashrc so that you don't need to sudo edit /etc/hosts all the time... export HOSTALIASES=~/.hosts Then add your hosts to .hosts file. Tested on * See also References

custom_jira_translation_docker_container

Anonymous (anonymous@undisclosed.example.com) — 2020-12-14T09:38:27+00:00

atlassian jira docker Custom Jira translation in Docker container Navigate to Docker volume cd /var/lib/docker/volumes/jiraVolume/_data/plugins/installed-plugins Get existing language jar file Edit atlassian-plugin.xml with your data Replace properties file with your file (escape characters if needed, see below)

db_replication_over_stunnel

Anonymous (anonymous@undisclosed.example.com) — 2021-04-15T11:18:44+00:00

mysql mariadb stunnel replication DB replication over stunnel Install stunnel on master and slave apt-get install stunnel Enable stunnel autostart sed -i '/ENABLED/s/0/1/' /etc/default/stunnel4 Create server certificate (client certs are not necessary). Just copy the server.certs, ca, and keys to slave server

dconf

Anonymous (anonymous@undisclosed.example.com) — 2022-04-17T09:40:21+00:00

gnome shortcuts dconf gsettings settings dconf You can use dconf to manipulate gnome shortcuts from terminal. For example this lists where gnome saves its screenshots dconf dump /org/gnome/gnome-screenshot/ List all dconf keys dconf dump / Read specific path dconf dump /org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom1/

dd_disk_performance_test

Anonymous (anonymous@undisclosed.example.com) — 2022-09-30T12:12:51+00:00

disk performance testing dd disk performance test dd if=/dev/zero of=/data_sdb/testfile bs=1G count=1 oflag=dsyncdd if=/dev/zero of=/data/testfile bs=512 count=1000 oflag=dsync Tested on * See also References

deja_dup_duplicity_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-09-19T21:51:17+00:00

backup Deja dup/duplicity commands List backups: duplicity collection-status file:///media/nas-share/home_folder_backup Tested on * See also References *

delete_hard_disk_device_virtualbox

Anonymous (anonymous@undisclosed.example.com) — 2022-09-30T12:14:06+00:00

disk virtualbox vm virtualization Delete hard disk device in virtualbox vboxmanage list hddsvboxmanage closemedium disk --delete Tested on * See also References

deleting_images_private_docker_registry

Anonymous (anonymous@undisclosed.example.com) — 2024-01-12T10:30:51+00:00

docker registry Deleting images from private docker registry Your registry has to have set REGISTRY_STORAGE_DELETE_ENABLED variable. * get all repos curl -s localhost:52000/v2/_catalog | jq * get all tags in repo curl -s localhost:52000/v2/test/tags/list | jq * get digest of test repo with image tagged as test33

deploying_django_website

Anonymous (anonymous@undisclosed.example.com) — 2021-07-16T09:15:36+00:00

python django Deploying Django website On remote server; make user and add to superuser group adduser django_majaaadduser django_maja sudo Insert public key and disable password authentication mkdir -m 700 .ssh vi .ssh/authorized_keys sudo vi /etc/ssh/sshd_config systemctl restart sshd.service

desktop_shortcut_to_open_ssh_tunnel_and_then_open_firefox_tab

Anonymous (anonymous@undisclosed.example.com) — 2021-07-07T07:53:07+00:00

ssh desktop Desktop shortcut to open SSH tunnel and then open Firefox tab Example of forwarding local port 8181 to server's 8181 and accessing that via browser. [Desktop Entry] Version=1.0 Type=Application Name=wiki Comment= Exec=bash -c "ssh -fNT -L 8181:localhost:8181 ; firefox http://localhost:8181" Icon= Path= Terminal=false StartupNotify=false

disable_cacheing_files_certain_extension_apache

Anonymous (anonymous@undisclosed.example.com) — 2022-09-19T21:49:47+00:00

apache webserver cache Disable cacheing of files with certain extension in apache Enable headers module: a2enmod headers In vhost config add: Header set Cache-Control "no-store, no-cache, must-revalidate" This sends a header field to browser instructing it not to cache files ending with .apk.

disable_gmail_login_challenge_logging_some_user

Anonymous (anonymous@undisclosed.example.com) — 2020-12-21T15:37:45+00:00

gmail Disable login challenge by google In order to login as a normal user if the user's emails are managed on Google gmail (Gmail Workspace aka G Suite) you need to temporarily disable the challenge for that user. To do that go to Users > some_user > Security

disable_you_have_new_mail_in_var_mail

Anonymous (anonymous@undisclosed.example.com) — 2021-10-07T09:27:17+00:00

mail bash Disable "You have new mail in var mail..." Add to .bashrc unset MAILCHECK Tested on * Debian 8 See also References *

divide_entire_column_number_libreoffice

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:36:39+00:00

libreoffice Divide entire column with number in LibreOffice 1. Copy the number with which to divide into clipboard. 2. Select data from column (don't select entire column until end of document, the file will be large, select only cells with your data) 3. Go to

divi_themebuilder_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2021-05-19T09:42:29+00:00

wordpress Divi themebuilder troubleshooting Infinite loading issue Clear the browsers cache. Clear local storage. Tested on * See also References

dkim_keys_via_amavis

Anonymous (anonymous@undisclosed.example.com) — 2022-09-30T12:16:13+00:00

mail dkim DKIM keys via amavis Generate new private/public key pair Manual amavisd-new genrsa /var/lib/amavis/example.key.pem 1024 openssl rsa -in example.key.pem -out /var/lib/amavis/example.key.pem.public -pubout -outform PEM Create new configuration vi /etc/amavis/conf.d/60-dkim

dockerized_jenkins_install_docker_via_ansible_dind

Anonymous (anonymous@undisclosed.example.com) — 2023-12-21T09:48:32+00:00

docker ansible jenkins Dockerized jenkins install with docker in docker via ansible (dind) Example of compose file: version: '3' services: jenkins: build: context: . dockerfile: Dockerfile-jenkins-docker container_name: jenkins-docker networks: - jenkins restart: always environment: - DOCKER_HOST=tcp://docker:2376 - DOCKER_CERT_PATH=/certs/client - DOCKER_TLS_VERIFY=1 …

dockerizing_next_js_monorepo_app

Anonymous (anonymous@undisclosed.example.com) — 2025-02-14T13:11:37+00:00

js nextjs docker Dockerizing next.js monorepo app Example docker file: FROM node:20-slim AS base ENV PNPM_HOME="/pnpm" ENV PATH="$PNPM_HOME:$PATH" RUN corepack enable # below is workaround for https://github.com/mendableai/firecrawl/issues/1126 RUN corepack prepare pnpm@9.15.0 --activate FROM base AS build COPY . /usr/src/app WORKDIR /usr/src/app RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile RUN pnpm turbo run build RUN pnpm --filter=app1 --prod deploy /pr…

docker_commands

Anonymous (anonymous@undisclosed.example.com) — 2025-11-04T10:00:55+00:00

docker cli Docker commands Run bash inside container docker exec -it /bin/bash Copy file from host to container docker cp : e.g. docker cp LocalSettings.php my-mediawiki:/var/www/html/ Get container IP docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}'

docker_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-04-10T12:25:22+00:00

docker troubleshooting ansible Docker troubleshooting DOCKER-ISOLATION-STAGE-1 An unexpected docker error occurred: 500 Server Error: Internal Server Error ("unable to insert jump to DOCKER-ISOLATION-STAGE-1 rule in FORWARD chain: (iptables failed: iptables --wait -I FORWARD -j DOCKER-ISOLATION-STAGE-1: iptables v1.8.7 (nf_tables): Chain 'DOCKER-ISOLATION-STAGE-1' does not exist Try `iptables -h' or 'iptables --help' for more information. (exit status 2))") An exception occurred during t…

dokuwiki

Anonymous (anonymous@undisclosed.example.com) — 2020-07-29T09:35:28+00:00

DokuWiki wiki:dokuwiki DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database. It is loved by users for its clean and readable syntax. The ease of maintenance, backup and integration makes it an administrator's favorite. Built in

download_all_pdfs_humble_bundle

Anonymous (anonymous@undisclosed.example.com) — 2021-03-31T11:02:39+00:00

humblebundle bash javascript Download all pdfs from Humble Bundle Open website inspector (Ctrl+Shift+i), then in console paste this. `cmds = ""; for (a of document.getElementsByTagName("a")) { if (a.href.startsWith("https://dl.humble.com")) cmds += "wget --content-disposition \"" + a.href + "\"\n"; }; console.log(cmds);`

download_file_apache_website_by_sending_custom_header

Anonymous (anonymous@undisclosed.example.com) — 2022-04-17T10:47:08+00:00

apache webserver Download file from apache website by sending custom header Download some file from URL like . In apache host configuration add this: SetEnvIf X-My-Token "mysecrettoken" my-token Alias /somedir /var/www/somedir Require env my-token

download_single_file_bitbucket_server

Anonymous (anonymous@undisclosed.example.com) — 2021-02-12T10:13:18+00:00

bitbucket atlassian cli Download single file from BitBucket server * Navigate to your repo and copy link location of your Raw File option. * Download the file curl --silent --show-error --user https://example.com/projects//repos//raw//?at=refs%2Fheads%2Fmaster -o

drop_lots_ip_subnets_shorewall

Anonymous (anonymous@undisclosed.example.com) — 2025-10-29T15:16:11+00:00

shorewall firewall python subnet Drop lots of IP subnets in shorewall You can use this method to block lots of bots coming from thousands of IPs. First create an input file with one IP on each line. Example below is from nginx access logs where we collect the IPs from user-agents identified as python-httx

elasticsearch_commands

Anonymous (anonymous@undisclosed.example.com) — 2023-01-11T16:03:12+00:00

elasticsearch Elasticsearch commands Get elastic search indexes curl -XGET 'localhost:9200/_cat/indices?v&pretty' Delete index curl -XDELETE 'localhost:9200/twitter?pretty' Replace “twitter” with your index name. Delete all indices curl -X DELETE 'http://localhost:9200/_all'

elasticsearch_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-07-23T11:28:55+00:00

troubleshooting elasticsearch opensearch graylog Elasticsearch/Opensearch troubleshooting If graylog stops showing message streams it could be an issue with indexes. checksum failed Health status will report red in the web UI or with API: # curl -X GET "localhost:9200/_cluster/health?pretty" { "cluster_name" : "elasticsearch", "status" : "red", "timed_out" : false, "number_of_nodes" : 1, "number_of_data_nodes" : 1, "active_primary_shards" : 97, "active_shards" : 97, "reloc…

emby_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-02-01T20:17:06+00:00

media_server streaming troubleshooting emby plex raspberrypi emby troubleshooting emby can see folder but no files displayed If the permission are ok, check to see if the folder has files other than multimedia ones. You might get an error that won't show up in logs. To check switch to emby user and run find command:

enable_ipv6_lxc_containers

Anonymous (anonymous@undisclosed.example.com) — 2021-05-19T09:59:33+00:00

lxc networking containers Enable ipv6 for lxc containers Add to container config (substitute correct ipv6 address): lxc.network.ipv6 = 2a01:123:11:99e:10:10:10:10/120 lxc.network.ipv6.gateway = auto Check firewall /etc/shorewall6/rules ... SSH(ACCEPT) net lxc:[2a01:123:11:99e:10:10:10:10] Trcrt(ACCEPT) net lxc:[2a01:123:11:99e:10:10:10:10] ...

enable_networking_between_vms_virtualbox

Anonymous (anonymous@undisclosed.example.com) — 2022-09-30T12:23:13+00:00

networking virtualization virtualbox Enable networking between VMs in Virtualbox In Settings>Network of the VM set “Attached to: Internal network” On host add DHCP server: VBoxManage dhcpserver add --netname intnet --ip 10.13.13.100 --netmask 255.255.255.0 --lowerip 10.13.13.101 --upperip 10.13.13.254 --enable

enable_ocsp_stapling

Anonymous (anonymous@undisclosed.example.com) — 2023-03-27T12:49:11+00:00

ssl nginx apache webserver Enable OCSP stapling nginx # OCSP stapling ssl_stapling on; ssl_stapling_verify on; ssl_trusted_certificate /etc/nginx/certs/ca_stapling.pem; ca_stapling.pem should contain (from top to bottom) intermediate cert> root cert. Otherwise you might get an error like:

enable_pwd_auth_on_mysql_8.0_on_centos

Anonymous (anonymous@undisclosed.example.com) — 2021-03-08T14:55:03+00:00

mysql centos Enable pwd auth on mysql 8.0 on CentOS yum localinstall https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm yum install mysql-community-serversystemctl start mysqld systemctl status mysqldgrep 'temporary password' /var/log/mysqld.log mysql_secure_installation

enable_various_filetype_uploads_to_mediawiki

Anonymous (anonymous@undisclosed.example.com) — 2020-12-17T11:05:11+00:00

mediawiki Enable various filetype uploads to MediaWiki Add this to the end of LocalSettings.php file: Permit upload of these files $wgFileExtensions = array( 'py', 'sh', 'png', 'gif', 'jpg', 'jpeg', 'doc', 'xls', 'mpp', 'pdf', 'ppt', 'tiff', 'bmp', 'docx', 'xlsx', 'pptx', 'ps', 'odt', 'ods', 'odp', 'odg' );

encrypt_content_ansible_vault

Anonymous (anonymous@undisclosed.example.com) — 2021-08-13T13:25:04+00:00

ansible encryption Encrypt content with Ansible Vault This will store the password in system keyring and an ansible script will use that password for encryption/decryption. This assumes ansible was installed with pip: pip3 install --user ansible Link the python3 executable to python

error_invalid_environment_block_press_any_key_continue

Anonymous (anonymous@undisclosed.example.com) — 2022-05-03T11:21:17+00:00

troubleshooting ubuntu linux grub Error: invalid environment block. Press any key to continue... Press E at the GRUB menu. Find the line saying save_env recordfail and delete all <<- this was not needed Only these steps: sudo -i Then, run each command, one-by-one. cd /boot/grub rm grubenv grub-editenv grubenv create grub-editenv grubenv set default=0 grub-editenv grubenv list update-grub

execute_custom_command_gnome

Anonymous (anonymous@undisclosed.example.com) — 2025-09-03T13:00:52+00:00

shortcuts gnome dconf Execute custom command from Gnome Execute a bash script that takes output of xclip as first argument bash -c "/home/user/what_hostname.sh $(xclip -o)" Insert above line in Settings > Keyboard > Keyboard Shortcuts > View and Customize Shortcuts > Custom Shortcuts

exim_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-09-30T12:27:16+00:00

exim mail exim troubleshooting exim not sending emails Error in /var/log/exim4/mainlog 2017-06-28 11:53:21 exim 4.84_2 daemon started: pid=13291, -q30m, listening for SMTP on [127.0.0.1]:25 [::1]:25 2017-06-28 11:53:21 Start queue run: pid=13292 2017-06-28 11:53:21 1Xf0lB-0000Iv-AZ cancelled by timeout_frozen_after 2017-06-28 11:53:21 1Xf0lB-0000Iv-AZ Completed 2017-06-28 11:53:21 End queue run: pid=13292 2017-06-28 12:00:06 exim 4.84_2 daemon started: pid=14119, -q30m, listening for SMTP o…

expand_existing_letsencrypt_certficate_multiple_domains

Anonymous (anonymous@undisclosed.example.com) — 2021-01-14T15:38:46+00:00

letsencrypt ssl apache Expand existing letsencrypt certficate for multiple domains Check existing certifcates certbot-auto certificates Expand existing one Remember to include the already existing domain certificate (staging.example.com). certbot-auto certonly --expand -d staging.example.com,subdomain1.staging.example.com,subdomain100.staging.example.com,subdomain200.staging.example.com

expose_apps_local_lan_via_traefik_docker

Anonymous (anonymous@undisclosed.example.com) — 2025-08-24T09:36:51+00:00

traefik docker mikrotik dns Expose apps on local lan on DNS names via Traefik and Docker This is an example of exposing Ampache on ampache.lan domain. First, make sure that the above domain is set to point to whatever IP you are hosting the ampache at. You will need to resolve this domain on your local network. For example, in Mikrotik router, go to

fail2ban_examples

Anonymous (anonymous@undisclosed.example.com) — 2024-03-06T13:02:03+00:00

iptables ban firewall ddos fail2ban examples Port 80 ban Create new jail file in /etc/fail2ban/jail.d/test.local [bottest] enabled = true maxretry = 4 findtime = 60s bantime = 60s action = iptables[name=bloKKKED, port=http] logpath = %(nginx_access_log)s This will create a

ffmpeg_commands

Anonymous (anonymous@undisclosed.example.com) — 2026-03-21T09:58:41+00:00

ffmpeg youtube videos ffmpeg commands Cut video from 29 minutes to the end and save in out file ffmpeg -ss 00:29:50 -i video.webm -c copy out.webm Capture desktop ffmpeg -hide_banner -framerate 20 -video_size $(xrandr | awk '/\*/{printf$1}') -f x11grab -i $DISPLAY.0 screenRecording.mp4

filezilla_not_using_password_sftp_connection

Anonymous (anonymous@undisclosed.example.com) — 2021-04-08T07:31:07+00:00

filezilla ftp sftp Filezilla not using password with SFTP connection? Its trying to use SSH keys no matter if the password is explicitly chosen to connect. Simplest workaround is to run filezilla from terminal like so: SSH_AUTH_SOCK=""; filezilla Another is to rename .ssh folder to e.g. .ssh_backup so that it doesn't see the keys.

fixed_btn_size

Anonymous (anonymous@undisclosed.example.com) — 2020-12-10T15:48:03+00:00

python code kivy Fixed button size in GridLayout from kivy.app import App from kivy.uix.screenmanager import Screen from kivy.lang import Builder gui = ''' LoginScreen: GridLayout: cols: 2 Label: text: 'Subject' Label: Label: text: '1' SingleLineTextInput: Label: text: '2' SingleLineTextInput: Label: text: '3' SingleLineTextInput: Label: t…

flameshot_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-10-10T07:38:16+00:00

troubleshooting screenshot flameshot gui Flameshot can't save the screenshot and you get this error: ~$ flameshot gui (flameshot:273151): GVFS-WARNING **: 10:59:28.441: The peer-to-peer connection failed: Timeout was reached. Falling back to the session bus. Your application is probably missing --filesystem=xdg-run/gvfsd privileges.

ftp_login_ssl_tls_handshake_failed

Anonymous (anonymous@undisclosed.example.com) — 2021-04-30T10:50:30+00:00

ftp troubleshooting ssl Ftp ftp_login(): SSL/TLS handshake failed PHP Warning: ftp_login(): SSL/TLS handshake failed in /home/client/libraries/php-ftp-client/FtpClient/FtpWrapper.php on line 85 PHP Warning: ftp_login(): AUTH TLS successful in /home/client/libraries/php-ftp-client/FtpClient/FtpWrapper.php on line 85

ftp_pasv_operation_not_permitted_error

Anonymous (anonymous@undisclosed.example.com) — 2021-04-30T10:51:18+00:00

ftp php troubleshooting Ftp PASV Operation not permitted error Error from php program when trying to upload a pdf file to remote server: PHP Warning: ftp_put(): Entering Extended Passive Mode (|||65500|) in /home/client/libraries/php-ftp-client/FtpClient/FtpWrapper.php on line 85 PHP Warning: ftp_put(): PASV: Operation not permitted in /home/client/libraries/php-ftp-client/FtpClient/FtpWrapper.php on line 85

gdrive_dload_script

Anonymous (anonymous@undisclosed.example.com) — 2021-01-13T09:11:18+00:00

#!/bin/bash MAILS=( user1@example.com user2@example.com ) for MAIL in "${MAILS[@]}" do echo "==========================================================================" echo ">> Downloading Google drive files for user ${MAIL}" echo "==========================================================================" /home/antisa/bin/gam/gam user "${MAIL}" get drivefile query "'me' in owners" targetfolder gdrive_dload/"${MAIL}-gdrive" echo ">> Compressing folder for "${MAIL}"" zi…

geoblock_country_bash_script

Anonymous (anonymous@undisclosed.example.com) — 2021-07-15T13:35:37+00:00

bash scripts networking firewall Geoblock country bash script Install prerequisites apt install ipset aggregate shorewall Setup shorewall Simple interface tutorial Install and start ipset script #!/bin/bash # debug # set -x exec 1> >(logger -s -t $(basename $0)) 2>&1 logger "Start: $0" /sbin/ipset create geoblock hash:net -exist /sbin/ipset flush geoblock for IP in $(/usr/bin/wget -O - http://www.ipdeny.com/ipblocks/data/aggregated/fr-aggregated.zone)…

github_actions_examples

Anonymous (anonymous@undisclosed.example.com) — 2025-02-17T14:20:07+00:00

github cicd Github actions examples Build and download containers to server name: CI on: push: branches: [develop] pull_request: branches: [develop] jobs: build: permissions: packages: write contents: write environment: develop strategy: matrix: node-version: [18.x, 20.x] name: Build with ${{ matrix.node-version }} runs-on: ubuntu-latest steps: - uses: actions/checkout@v3 - name: Use Node.js ${{ matrix.node-vers…

github_cli_commands

Anonymous (anonymous@undisclosed.example.com) — 2024-02-12T09:22:30+00:00

cli github Github cli commands Add team to repo Login to github first: gh auth login ? What account do you want to log into? GitHub.com ? What is your preferred protocol for Git operations on this host? SSH ? Upload your SSH public key to your GitHub account? Skip ? How would you like to authenticate GitHub CLI? Login with a web browser ! First copy your one-time code: B095-850C Press Enter to open github.com in your browser... Gtk-Message: 16:54:29.259: Not loading module "atk-bridge": T…

github_webhooks_via_api_calls

Anonymous (anonymous@undisclosed.example.com) — 2024-05-15T13:33:40+00:00

git github webhooks api Github webhooks via api calls Get all webhooks curl -H "Authorization: token TOKEN" --request GET https://api.github.com/repos/USERNAME/scripts_and_progs/hooks Get specific webhook curl -H "Authorization: token TOKEN" --request GET https://api.github.com/repos/USERNAME/scripts_and_progs/hooks/158835392

git_line_endings_problem

Anonymous (anonymous@undisclosed.example.com) — 2021-03-30T11:41:56+00:00

git Git line endings problem When line ending cross-platform differences are causing git to modify files (Warning: LF will be converted to CRLF or vice-versa): We can change config settings on each repo, or better yet, using shared .gitattributes file

git_pull_via_ssh_public_key

Anonymous (anonymous@undisclosed.example.com) — 2025-08-25T14:31:29+00:00

git ssh git pull via ssh public key If using for example 'myuser' user but with a custom ssh key name i.e. myuser_github and not id_rsa you will get an error if trying to run the following command: myuser@host:~/my-user$ git clone git@github.com:someuser/repo.git . Cloning into '.'... Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.

google_cloud_policies_iam

Anonymous (anonymous@undisclosed.example.com) — 2023-02-01T15:48:31+00:00

iam acl access_control google bigquery Google cloud policies (IAM) Allowing a user access to only a specific table in dataset Select the table in the dataset you want to share and click on “Share” in the toolbar and then on “Add principal”. On next screen input gmail account of user and select role

graylog_backup_and_restore

Anonymous (anonymous@undisclosed.example.com) — 2022-02-18T12:44:53+00:00

graylog backup Graylog backup and restore Installation of Graylog docker Dump the mongodb mongodump --db=graylog --out=/usr/share/graylog/data/graylogmongo.dump Copy the config folder from /usr/share/graylog/data/config to restore inputs etc. Config dir listing:

graylog_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2023-02-28T14:00:05+00:00

graylog troubleshooting logging monitoring Graylog troubleshooting Messages not processing If there are a lot of messages piling up in Graylog's journal (System>Nodes>nodename>Disk Journal> Utilization) but they are not showing in the Search, you will need to delete the journal folder under

group_jira_customers_by_project_mysql_query

Anonymous (anonymous@undisclosed.example.com) — 2020-12-14T09:44:01+00:00

atlassian jira SELECT t1.orgid, AO_MEM.USER_KEY, AOO.NAME, c.ID, c.user_name, c.first_name, c.last_name, c.email_address, t1.project, t1.proj_key FROM AO_54307E_ORGANIZATION AS AOO INNER JOIN AO_54307E_ORGANIZATION_MEMBER AS AO_MEM ON AOO.ID=AO_MEM.ORGANIZATION_ID INNER JOIN cwd_user AS c ON AO_MEM.USER_KEY=CONCAT("JIRAUSER",c.ID) INNER JOIN ( SELECT AOP.ORGANIZATION_ID AS orgid, p.pname AS project, p.pkey AS proj_key FROM AO_54307E_ORGANIZATION_PROJECT AS AOP INNER JOIN project AS p O…

grub_errors

Anonymous (anonymous@undisclosed.example.com) — 2024-04-05T14:50:31+00:00

grub ubuntu troubleshooting Grub errors out Example of some error output: dpkg: error processing package grub2-common ... grub-pc depends on grub-common (= 2.04-1ubuntu26.13); however: Package grub-common is not configured yet. ... No apport report written because MaxReports is reached already No apport report written because MaxReports is reached already

gsettings

Anonymous (anonymous@undisclosed.example.com) — 2022-02-08T10:27:55+00:00

gnome shortcuts dconf gsettings settings keyboard gsettings This can be used to change various Ubuntu/Gnome DE settings from terminal, for example changing shortcuts, similar to dconf. List keys gsettings list-recursively Show setting gsettings get org.gnome.settings-daemon.plugins.media-keys window-screenshot

headphones_not_detected_plugged_before_boot

Anonymous (anonymous@undisclosed.example.com) — 2020-12-17T10:40:32+00:00

sound Headphones not detected if plugged in before boot Go to Audio Mixer and select “Analog Stereo Duplex” in Configuration tab. Tested on * Xubuntu 20.04.1 References *

hetzner_server_replacement

Anonymous (anonymous@undisclosed.example.com) — 2022-08-25T10:09:31+00:00

hetzner networking Hetzner server replacement If the Hetzner server was replaced which includes the network card or motherboard,but not the disks, you need to update the networking configuration and firewall to reflect the new interface name. Use the Hetzner rescue console and mount the partition e.g.

highlight_diff_words

Anonymous (anonymous@undisclosed.example.com) — 2021-03-30T11:20:14+00:00

http_https_redirect

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:02:37+00:00

ssl apache http to https redirect Enable rewrite engine in non-ssl conf. RewriteEngine on RewriteCond %{SERVER_NAME} =yoursite.com [OR] RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent] In ssl conf add Include /etc/letsencrypt/options-ssl-apache.conf SSLCertificateFile /etc/letsencrypt/live/yoursitename/fullchain.pem SSLCertificateKeyFile /etc/letsencrypt/live/yoursitename/privkey.pem

icinga_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2023-09-22T09:58:15+00:00

icinga nagios monitoring troubleshooting Icinga/nagios troubleshooting Remote command execution failed: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Try removing the old host key from /home/nagios/.ssh/known_hosts. check_mysql: slave query error: Access denied: you need (at least one of) the SUPER,REPLICATION CLIENT privilege(s) for this operation

import_repository_bitbucket_github

Anonymous (anonymous@undisclosed.example.com) — 2024-02-07T15:20:39+00:00

git github atlassian bitbucket migration Import repository from Bitbucket to Github Create app password screenshot Personal Bitbucket settings Make sure to use the username defined in Account Settings part (this might be different from displayed in top right corner) in Github importer Tested on

increase_jenkins_user_session_timeout

Anonymous (anonymous@undisclosed.example.com) — 2023-12-21T09:47:50+00:00

jenkins session timeout Increase jenkins user session timeout Add these option to java starting arguments --sessionTimeout=1440 --sessionEviction=43200 e.g. root@debian11-21:[~]: ps fauxw | grep jenk jenkins 18642 0.3 31.6 4715720 1268388 ? Ssl Dec20 4:05 /usr/bin/java -Djava.awt.headless=true -jar /usr/share/java/jenkins.war --webroot=/var/cache/jenkins/war --httpPort=8080 --sessionTimeout=1440 --sessionEviction=43200

increase_rundeck_user_session_timeout

Anonymous (anonymous@undisclosed.example.com) — 2023-12-21T10:10:19+00:00

rundeck session timeout Increase rundeck user session timeout Add this server.servlet.session.timeout=86400 to /etc/rundeck/rundeck-config.properties to increase duration of user sessions to 1 day, so users will stay logged in longer. If running in docker you need to set the

input_muliple_form_fields_keepassxc

Anonymous (anonymous@undisclosed.example.com) — 2024-05-09T12:37:27+00:00

keepass login password Input muliple form fields with keepassxc If you need to input multiple information on web pages like for e.g. on AWS login Account ID, IAM user and password, use the following procedure. On the website login click on Keepassxc browser plugin and then on

installing_android_emulator_debian_10

Anonymous (anonymous@undisclosed.example.com) — 2021-02-15T09:42:33+00:00

android Installing Android emulator on Debian 10 If installing on Proxmox LXC container, the container needs to be a privileged one Make a backup of unprivileged and restore it as privileged if you first installed everything in unprivileged one. Enable “

installing_atlassian_servicedesk

Anonymous (anonymous@undisclosed.example.com) — 2021-03-29T14:02:48+00:00

atlassian servicedesk Installing Atlassian Servicedesk Just follow this guide For DB For enabling SSL with nginx as reverse proxy, add this to /opt/atlassian/jira/conf/server.xml

installing_confluence_server

Anonymous (anonymous@undisclosed.example.com) — 2023-10-17T09:18:29+00:00

atlassian confluence Installing Confluence server Install can be done on same server as servicedesk app, and is almost the same as servicedesk install Just follow this guide: For DB: For reverse proxy + docker setup see: Installing Confluence server in Docker behind reverse pro…

installing_confluence_server_in_docker_behind_reverse_proxy

Anonymous (anonymous@undisclosed.example.com) — 2023-10-17T09:18:50+00:00

atlassian confluence docker Installing Confluence server in Docker behind reverse proxy Download Confluence docker image and pass in corresponding environment variables docker run --network=atl --ip=172.20.20.3 -e ATL_PROXY_NAME=example.com -e ATL_PROXY_PORT=443 -e ATL_TOMCAT_CONTEXTPATH=confluence -e ATL_TOMCAT_SCHEME=https -v /var/lib/docker/volumes/confluenceVolume/:/var/atlassian/application-data/confluence --name="confluence" -d -p 8282:8090 -p 8383:8091 atlassian/confluence-server

installing_mysql5_7_jira

Anonymous (anonymous@undisclosed.example.com) — 2021-01-11T13:54:35+00:00

atlassian jira mysql Installing mysql5.7 for Jira Install MySQL 5.7 replacing MariaDB 10.1 and enabling emojis and special chars support systemctl stop jira.service systemctl stop confluence.service mysqldump -u jiradbuser -p --opt --single-transaction jiradb > jiradb.sql mysqldump -u confluencedbuser -p --opt --single-transaction confluencedb > confluencedb.sql

install_2_node_jira_datacenter_docker_behind_apache_reverse_proxy

Anonymous (anonymous@undisclosed.example.com) — 2022-07-12T12:53:53+00:00

atlassian jira Install 2 node Jira Datacenter in Docker behind apache reverse proxy This assumes you already have a mysql container running with a created database for jira on the same docker network, for example at ip 172.20.20.2. If not create that container and the docker network. Install first node

install_battle_net_ubuntu

Anonymous (anonymous@undisclosed.example.com) — 2021-04-01T12:20:30+00:00

wine games Install battle.net on Ubuntu wget https://dl.winehq.org/wine-builds/Release.key sudo apt-key add Release.key sudo apt-add-repository 'https://dl.winehq.org/wine-builds/ubuntu/'sudo apt install wine-staging sudo apt install ttf-mscorefonts-installer rm Release.key

install_certbot

Anonymous (anonymous@undisclosed.example.com) — 2021-08-19T06:55:27+00:00

ssl letsencrypt certbot installation For older versions see Install certbot via manual method Debian 10 This will also install a systemd timer unit to automatically run the renewal procedure. See Install it from repository: apt-get install certbot If you are running apache you also need a plugin for it:

install_gogs_debian_8_jessie_nginx_reverse_proxy

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T09:19:50+00:00

git Install gogs on Debian 8 Jessie with nginx as reverse proxy Install mysql 5.7 version, git and sudo (for earler mysql version see gogs script below): wget https://dev.mysql.com/get/mysql-apt-config_0.8.9-1_all.deb dpkg -i mysql-apt-config_0.8.9-1_all.deb apt update apt install mysql-server git sudo nginx

install_jenkins_debian_8

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T09:22:23+00:00

jenkins devops Install jenkins on Debian 8 Jenkins requires Java > 1.7 that ships by default. Install java from backports: echo "deb http://http.debian.net/debian jessie-backports main" | tee --append /etc/apt/sources.list.d/jessie-backports.list > /dev/null Add jenkins repo:

install_json_log_filter_parser_plugin_rundeck

Anonymous (anonymous@undisclosed.example.com) — 2022-09-07T10:08:36+00:00

rundeck docker Install JSON log filter parser plugin in Rundeck JSON log filter plugin is not installed by default and it seems it cannot be installed through the Rundeck GUI. To install it manually enter the container docker exec -it rundeck-docker sh Enter the libext directory and download the jar file:

install_mongodb_php7

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T09:25:00+00:00

mongo php Install mongodb with php7 Add repos: echo -e "deb http://repo.mongodb.org/apt/debian jessie/mongodb-org/3.4 main\ndeb http://packages.dotdeb.org jessie all" >> /etc/apt/sources.list Add signing keys for mongo repo and php7: apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6

install_mysql_non_interactively

Anonymous (anonymous@undisclosed.example.com) — 2021-04-28T14:20:09+00:00

mysql mariadb Install mysql non-interactively Export variable: export DEBIAN_FRONTEND=noninteractive Tested on * See also References *

install_nvidia_graphics_driver_terminal_ubuntu_based_distros

Anonymous (anonymous@undisclosed.example.com) — 2021-04-26T10:37:54+00:00

nvidia drivers Install nvidia graphics driver from terminal on ubuntu based distros sudo add-apt-repository ppa:graphics-drivers/ppa ubuntu-drivers devices sudo apt install nvidia-driver-450 For Steam sudo apt install libnvidia-gl-450:i386 Tested on * KDE neon User Edition 5.21 (Ubuntu 20.04)

install_openvpn_lxc

Anonymous (anonymous@undisclosed.example.com) — 2022-09-27T08:42:17+00:00

lxc openvpn vpn Install OpenVPN in lxc On Debian 9 Stretch host create these files for Debian 7 Wheezy container mkdir /dev/net mknod /dev/net/tun c 10 200 Follow tutorial at apt-get install openvpn In server.conf plugin path for user/pass authentication: plugin /usr/lib/openvpn/openvpn-auth-pam.so system-auth

install_oracle_java_8_debian_9_stretch

Anonymous (anonymous@undisclosed.example.com) — 2026-01-13T10:14:52+00:00

java Install Oracle java 8 on Debian 9 (Stretch) Download tar.gz file from Then: mkdir /opt/java-jdk tar -C /opt/java-jdk -zxf jdk-8u131-linux-x64.tar.gz update-alternatives --install /usr/bin/java java /opt/java-jdk/jdk1.8.0_131/bin/java 1 update-alternatives --install /usr/bin/javac javac /opt/java-jdk/jdk1.8.0_131/bin/javac 1

install_samba4_ldap_authentication_backend

Anonymous (anonymous@undisclosed.example.com) — 2021-01-14T14:20:57+00:00

ldap samba Install Samba4 as LDAP Authentication Backend NOTE: * Provisioning the domain below will fail if samba is installed inside an unprivileged lxc container. See * Make sure that the servers can talk to each other, check firewall rules etc. if setting the directory replication

install_send_only_exim4_mail_server

Anonymous (anonymous@undisclosed.example.com) — 2021-10-09T22:27:42+00:00

mail Install send only exim4 mail server Install Exim and its dependencies apt-get -y install exim4 Configure Exim for your environment dpkg-reconfigure exim4-config Mail Server Configuration Type 1. The first configuration window you encounter will ask you to select the

install_specific_package_version

Anonymous (anonymous@undisclosed.example.com) — 2022-09-22T08:28:29+00:00

apt Install specific package version apt-get Show available versions: apt-cache policy Install package: sudo apt-get install apache2=2.3.35-4ubuntu1 apt List: apt list -a Install: apt install =4.6.0.20220906-1

install_wifi_bcm4352_driver_terminal_ubuntu_based_distros

Anonymous (anonymous@undisclosed.example.com) — 2021-04-26T10:37:18+00:00

drivers wifi Install wifi BCM4352 driver from terminal on ubuntu based distros sudo apt install firmware-b43-installer sudo apt-get install bcmwl-kernel-source [Terminal logs] Tested on * KDE neon User Edition 5.21 (Ubuntu 20.04) See also * Install nvidia graphics driver from terminal on ubuntu based distros References *

install_windows_subsystem_linux_wsl_virtualbox

Anonymous (anonymous@undisclosed.example.com) — 2024-12-17T13:23:09+00:00

wsl wsl1 windows virtualbox Install Windows Subsystem for Linux (WSL) in Virtualbox This is WSL version 1. Virtualbox 7 doesn't support Hyper-V guest virtualization, which is necessary for WSL 2. Copied from virtualbox forums. Works for Ubuntu host machine as well. Steps To install WSL1 in Windows 11 (latest version) do as follows:

ipv4_over_ipv6

Anonymous (anonymous@undisclosed.example.com) — 2023-05-10T07:42:54+00:00

networking kernel ipv4 over ipv6 Edit /etc/gai.conf Uncomment #precedence ::ffff:0:0/96 100 No restart required. Tested on * See also References *

jellyfin_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-12-29T17:18:04+00:00

jellyfin troubleshooting kodi xbmc transcoding jellyfin troubleshooting Can't play episode in avi format From log: {"Protocol":0,"Id":"2429f791cc97cf0bff4839634ccca224","Path":"/media/nas/Serije/Earth Final Conflict - Season 1-5 (All seasons)/Earth Final Conflict - Season 1/EFC 0101 - Decision.avi","EncoderPath":null,"EncoderProtocol":null,"Type":0,"Container":"avi","Size":366946304,"Name":"EFC 0101 - Decision","IsRemote":false,"ETag":"fd7ebe2f84f7e5a7a309f9fba43c4e74","RunTimeTicks":249823…

jenkins_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2023-09-11T09:13:25+00:00

jenkins troubleshooting Jenkins troubleshooting Too much logging Issue with a certain java library causes writes of hundreds of GBs in logs Solution is to run jenkins without DNS function In /etc/default/jenkins add these 2 options in JAVA_ARGS line: -Dhudson.DNSMultiCast.disabled=true -Dhudson.udp=-1

jira_ssl_apache2_configuration

Anonymous (anonymous@undisclosed.example.com) — 2021-01-11T14:45:36+00:00

atlassian jira apache Jira ssl apache2 configuration vhost configuration ServerAdmin webmaster@localhost DocumentRoot /var/www/html ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined RewriteEngine on RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,QSA,R=permanent] ServerAdmin webmaster@localhost DocumentRoot /var/www/html ErrorLog ${APACHE_LOG_…

jira_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2020-12-14T09:42:05+00:00

atlassian jira Jira troubleshooting If there are problems with displaying non-english characters (čćšđž..) change the database to mysql and set correct encoding. Jira container by default uses h2db which is a java DB. Run mysql docker container docker run --name mysql-jira -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=jira -d mysql:5.7

join_table_multiple_times

Anonymous (anonymous@undisclosed.example.com) — 2021-04-28T14:29:04+00:00

mysql mariadb sql Join table multiple times SELECT DISTINCT columnAAA,name,bf1.columnBBB,bf2.columnBBB FROM table1 AS bt LEFT JOIN table_to_join AS bf1 ON bt.columnAAA=bf1.columnCCC LEFT JOIN table_to_join AS bf2 ON bt.columnAAA=bf2.columnDDD INTO OUTFILE '/var/lib/mysql-files/table1.csv' FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\r\n';

keyboard_layout_options_gnome_i3_regolith_issue

Anonymous (anonymous@undisclosed.example.com) — 2021-12-24T23:49:51+00:00

troubleshooting gnome keyboard language i3 regolith Keyboard layout options Gnome/i3/regolith issue If there's an issue with i3/regolith key cobination interfering with keyboard layout shortcut for switching between layouts you can remove the shortcut by 2 ways. Edit dconf directly dconf write /org/gnome/desktop/input-sources/xkb-options "['grp:caps_toggle']"

kibana_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-10-10T11:37:01+00:00

kibana troubleshooting Kibana troubleshooting FATAL Error: Unable to complete saved object migrations for the [.kibana] index: The .kibana alias is pointing to a newer version of Kibana: v7.17.5 Make sure the kibana version matches the elasticsearch version. To find ES version run

kivy

Anonymous (anonymous@undisclosed.example.com) — 2020-11-28T16:25:09+00:00

RecycleView code examples Button examples

kivy_custom_size_widgets

Anonymous (anonymous@undisclosed.example.com) — 2020-12-09T13:02:08+00:00

python code kivy Custom button size in RecycleView from kivy.app import App from kivy.lang import Builder from kivy.uix.button import Button from kivy.uix.recycleview import RecycleView from kivy.uix.label import Label from kivy.uix.boxlayout import BoxLayout from kivy.uix.gridlayout import GridLayout from kivy.uix.popup import Popup from kivy.graphics import Rectangle from kivy.uix.image import Image, AsyncImage from kivy.uix.widget import Widget from kivy.uix.behaviors import ButtonBehavior…

kivy_recycle_view1

Anonymous (anonymous@undisclosed.example.com) — 2020-12-14T18:34:38+00:00

python code RecycleView from kivy.app import App from kivy.lang import Builder from kivy.uix.button import Button from kivy.uix.recycleview import RecycleView from kivy.uix.boxlayout import BoxLayout items = [ {"color":(1, 1, 1, 1), "font_size": "20sp", "text": "white", "input_data": ["some","random","data"]}, {"color":(.5,1, 1, 1), "font_size": "30sp", "text": "lightblue", "input_data": [1,6,3]}, {"color":(.5,.5,1, 1), "font_size": "40sp", "text": "blue", "input_data": …

kubernetes_aws_cross_account_domain_validation_ssl_domains_using_cert_manager

Anonymous (anonymous@undisclosed.example.com) — 2025-02-25T09:35:09+00:00

k8s aws ssl letsencrypt kubernetes Kubernetes AWS cross-account domain validation for SSL domains using cert-manager Let's say you have a k8s cluster deployed in AWS in account A. You also have a different account, B and you wish to use a domain with ssl certificates from account B to point to a load balancer of the k8s cluster in account

letsencrypt_certificate_via_dns_authentication

Anonymous (anonymous@undisclosed.example.com) — 2022-12-21T15:23:30+00:00

letsencrypt ssl dns Letsencrypt certificate via DNS authentication Install certbot first Run following command for obtaining a wildcard certificate: certbot certonly --manual --preferred-challenges dns --agree-tos -d *.example.com Then follow certbot instructions for adding TXT record to your domain.

lets_encrypt_nginx_reverse_proxy

Anonymous (anonymous@undisclosed.example.com) — 2021-06-04T08:59:10+00:00

nginx example letsencrypt Lets Encrypt with an nginx reverse proxy Modify your server clause to allow the subdirectory .well-known to be served from a local directory, eg: server { listen 80; server_name sub.domain.com www.sub.domain.com; […] location /.well-known { alias /var/www/sub.domain.com/.well-known; } location / { # proxy commands go here […] } }

lighttpd_force_pdf_download

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T10:09:36+00:00

webserver lighttpd lighttpd force pdf download In lighttpd, to disable PDF opening in browser, add following config files in lighttpd.conf. This is useful in increasing CTR as browsers usually get stuck while loading PDF files. $HTTP["url"] =~ "(.*)\.pdf" { mimetype.assign = (".pdf" =>"application/octet-stream") setenv.add-response-header = ( "Content-Disposition" => "attachment" ) }

lighttpd_url_redirect

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T10:11:42+00:00

webserver lighttpd lighttpd url redirect # Redirect domain from .com to .org $HTTP["host"] =~ "^my\.example\.com" { url.redirect = ( "^/(.*)" => "http://my.example.org/$1" ) } Tested on * See also References

local_git_repo_sync_github

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T10:14:31+00:00

git Local git repo sync with github When we want to have different file content in local repo (example robots.txt file on live server) than the one on github repo * Make the changes on server * git update-index –assume-unchanged filename * Check if modification is tracked with git status (shouldn't be)

lock_down_mediawiki

Anonymous (anonymous@undisclosed.example.com) — 2020-12-17T11:08:23+00:00

mediawiki Lock down Mediawiki Add following directives to LocalSettings.php. Disable user account creation $wgGroupPermissions['*']['createaccount'] = false; Disable page creation editing $wgGroupPermissions['*']['edit'] = false; $wgGroupPermissions['*']['createpage'] = false;

logstash_pipelines

Anonymous (anonymous@undisclosed.example.com) — 2024-10-17T13:02:18+00:00

logstash elasticsearch elk opensearch logging logstash pipelines If you want to add multiple config files, use the pipelines. Edit pipelines.yml and add the path to configs there e.g. - pipeline.id: web_log_pipelined queue.type: persisted path.config: "/etc/logstash.d/web.conf" - pipeline.id: log2 queue.type: persisted path.config: "/etc/logstash.d/otherlog.conf" - pipeline.id: log3 queue.type: persisted path.config: "/etc/logstash.d/errors.conf" ...

logstash_setup

Anonymous (anonymous@undisclosed.example.com) — 2024-10-17T13:05:10+00:00

logstash elasticsearch elk opensearch logging Logstash setup Download and install wget https://artifacts.opensearch.org/logstash/logstash-oss-with-opensearch-output-plugin-8.9.0-linux-x64.tar.gz tar xf logstash-oss-with-opensearch-output-plugin-8.9.0-linux-x64.tar.gz cd logstash-8.9.0/ && bin/logstash-plugin install logstash-output-opensearch

logstash_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-03-05T15:00:12+00:00

logstash troubleshooting opensearch elasticsearch logstash troubleshooting Error, something like: [parent] Data too large, data for [] would be [11229874195/10.4gb], which is larger than the limit of [11225477939/10.4gb], usages [request=0/0b, fielddata=0/0b, in_flight_requests=11226443799/10.4gb, accounting=3430396/3.2mb]

lvm_commands

Anonymous (anonymous@undisclosed.example.com) — 2025-11-21T13:26:42+00:00

lvm lvm commands Increase logical volume Add 100 Gigabytes to LV lvextend -L +100G /dev/mapper/almalinux-lv_var You also have to resize the partition table, e.g. for xfs filesystem fsadm resize /dev/mapper/almalinux-lv_var Checking with df -h now should show increased size.

lxc_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-10-08T09:38:59+00:00

lxc vm virtualization lxc commands create centos 6 lxc-create -n bitrix-dev -t centos -- -R 6 create debian wheezy container lxc-create -n -t debian -- -r wheezy LXC rename container 1. Shutdown container lxc-stop -n 2. Open Terminal/Shell, Rename container root directory

lxc_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2021-04-01T12:46:18+00:00

lxc virtualization containers proxmox troubleshooting lxc troubleshooting Can't install filesystem package in Centos 7 unprivileged container? echo "%_netsharedpath /sys:/proc" >> /etc/rpm/macros.dist; yum -y update Tested on * Centos 7 See also * Change ulimits on unprivileged containers * Create container * Moving lxc containers * Change privileged to unprivileged container in Proxmox References *

mailcow_share_inbox_folder

Anonymous (anonymous@undisclosed.example.com) — 2025-08-19T14:43:33+00:00

mail share mailcow mailcow share inbox or folder * Login to the sogo path on your mailcow server e.g. * Click on the 3 dots next to the folder and choose Sharing... * Select the users mailbox and permissions. Thunderbird: Make sure the user is subscribed to the new folder or it won't show up. Right-click on account in sidebar and choose

mail_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2021-04-10T21:15:09+00:00

mail troubleshooting Mail troubleshooting Error: 554 Service unavailble, No IP queries Apr 9 11:09:08 myhostname postfix/smtpd[11535]: disconnect from unknown[92.118.38.82] Apr 9 11:09:10 myhostname postfix/smtpd[12679]: connect from mail2.protonmail.ch[185.70.40.22] Apr 9 11:09:10 myhostname postfix/smtpd[12679]: NOQUEUE: reject: RCPT from mail2.protonmail.ch[185.70.40.22]: 554 5.7.1 Service unavai lable; Client host [185.70.40.22] blocked using dbl.spamhaus.org; No IP queries, see https…

manipulate_google_drive_cli

Anonymous (anonymous@undisclosed.example.com) — 2024-06-13T14:25:27+00:00

google cli terminal gdrive Manipulate Google drive from CLI We will use rclone tool to duplicate folders in this example on a shared Google drive. First download the standalone binary e.g. wget https://downloads.rclone.org/v1.66.0/rclone-v1.66.0-linux-amd64.zip unzip rclone-v1.66.0-linux-amd64.zip

mariadb_reenable_password_authentication

Anonymous (anonymous@undisclosed.example.com) — 2022-01-20T11:47:53+00:00

mariadb mysql mariadb reenable password authentication Debian 10 Disable unix socket authentication update mysql.user set plugin='' where user='root'; flush privileges; Update password update mysql.user set password=password('yourpasswd') where user='root'; or run

mediawiki_inside_docker_container

Anonymous (anonymous@undisclosed.example.com) — 2020-12-17T11:02:32+00:00

docker mediawiki MediaWiki inside Docker container Create root web folder mkdir /var/www/mediawiki && chown -R www-data /var/www/mediawiki Download image and run it docker run --name my-mediawiki -v /var/www/mediawiki:/var/www/data -v /var/www/mediawiki/images:/var/www/html/images -p 8080:80 -d mediawiki

megacli_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-10-29T11:29:27+00:00

megacli_drive_rebuild

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:55:15+00:00

raid megacli megacli drive rebuild If you get this error: CRITICAL: megacli:[Volumes(2): DISK0.0:Degraded,DISK1.1:Degraded: Devices(4): 06,07,04=Online 05 (WD-WCC1P1090364WDC WD2000FYYZ-01UL1B1 01.01K02)=Unconfigured(bad)] You need to rebuild the drive. First use

megacli_replace_disk

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:54:46+00:00

raid megacli megacli replace disk List error count: megacli -PDList -aAll | egrep "Enclosure Device ID:|Slot Number:|Inquiry Data:|Error Count:|state" Check disk's serial number,you need smartmontools: aptitude install smartmontools Find Device Id (different from Enclosure Device ID !!!):

merge_multiple_commits_one_commit

Anonymous (anonymous@undisclosed.example.com) — 2021-03-30T11:44:05+00:00

git Merge multiple commits into one commit git rebase -i In this example, is either the SHA1 hash or the relative location from the HEAD of the current branch from which commits are analyzed for the rebase command. For example, if the user wishes to view 5 commits from the current HEAD in the past the command is

migrate_jira_new_server

Anonymous (anonymous@undisclosed.example.com) — 2021-01-11T14:49:44+00:00

atlassian jira Migrate Jira to new server Setup mysql wget https://dev.mysql.com/get/mysql-apt-config_0.8.11-1_all.deb dpkg -i mysql-apt-config_0.8.11-1_all.deb Create jira user: CREATE USER 'jiradbuser'@'localhost' IDENTIFIED BY ''; GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER,INDEX on jiradb.* TO 'jiradbuser'@'localhost' IDENTIFIED BY '';

migrating_gmail_one_suite_account_another

Anonymous (anonymous@undisclosed.example.com) — 2021-01-13T09:08:05+00:00

mail gmail migration Migrating gmail from one G suite account to another If you have Essentials edition Google Workspace edition (aka Gsuite), you can only migrate contacts. You can't migrate email or calendar data. The data migration service does not remove data from the source mailbox, nor does it remove the original source mailbox. All eligible data is copied during a migration, not moved/deleted, and the data in your source mailbox remains after a migration.

mikrotik_limit_traffic_burst

Anonymous (anonymous@undisclosed.example.com) — 2025-07-09T18:06:10+00:00

networking mikrotik Mikrotik limit traffic with burst Tested on * See also References

mikrotik_openvpn_setup

Anonymous (anonymous@undisclosed.example.com) — 2025-07-09T18:06:29+00:00

openvpn vpn mikrotik networking Mikrotik OpenVPN setup Create certificates mkdir mikrotik_certs cd mikrotik_certs openssl genrsa -des3 -out mikrotik_ca.key 4096 Use different Common name (CN) for ca.crt here then for server.crt below: openssl req -new -x509 -days 3650 -key mikrotik_ca.key -out mikrotik_ca.crt -config openssl.cnf

mikrotik_port_forwarding

Anonymous (anonymous@undisclosed.example.com) — 2025-07-09T18:05:37+00:00

mikrotik firewall port_forward router Mikrotik port forwarding If you are going to port forward port 80, that will interfere with Mikrotik's own Web UI. If you do this you will have to use the Winbox app to connect to it. See link below. Example of forwarding port 7000 on router to port 7000 on local IP 192.168.99.134

mikrotik_website_blocking

Anonymous (anonymous@undisclosed.example.com) — 2025-07-09T18:07:25+00:00

mikrotik networking firewall Mikrotik website blocking [PDF file] Tested on * See also References

monero_curl_commands

Anonymous (anonymous@undisclosed.example.com) — 2025-10-29T11:35:20+00:00

monero curl bitcoin monero curl commands Assuming monero-wallet-rpc is running on port 18082 and requires authentication. Get wallet: curl -u : --digest http://localhost:18082/json_rpc -d '{"jsonrpc":"2.0","id":"0","mehod":"get_balance","params":{"all_accounts":true}}' -H 'Content-Type: application/json'

mongodb_require_password

Anonymous (anonymous@undisclosed.example.com) — 2022-10-15T09:39:03+00:00

mongodb database mongodb require password In /etc/mongod.conf add: security.authorization: enabled then enter mongo: mongouse admindb.createUser( { user: "root", pwd: "sql", roles: [ { role: "root", db: "admin" } ] } ) Tested on * See also References

moving_lxc_containers

Anonymous (anonymous@undisclosed.example.com) — 2021-04-01T12:44:18+00:00

lxc virtualization containers proxmox Moving lxc containers cd /var/lib/lxc/$NAME/ tar --numeric-owner -czvf /root/container_fs-$(date +%Y%m%d).tar.gz ./* From one partition to another: cp -a /data2/lxc/agencyreports /data/lxc/ Tested on * See also * Change ulimits on unprivileged containers * Create container * lxc troubleshooting * Change privileged to unprivileged container in Proxmox References

multisite_wordpress_migration

Anonymous (anonymous@undisclosed.example.com) — 2022-10-15T09:53:21+00:00

wordpress migration Multisite Wordpress migration 1. Select only certain tables (each site has its own table prefix e.g. wp_3_*): mysql -p -N information_schema -e "select table_name from tables where table_schema = 'wordpress_multisite' and table_name like 'wp_3_%'" > tables.txt

mysqldump_tips

Anonymous (anonymous@undisclosed.example.com) — 2023-07-03T08:20:25+00:00

mysql cli mysqldump tips If you are going to use some of the commands below in crontab, the '%' sign needs to be escaped e.g. mysqldump -uroot -p --all-databases | bzip2 > db_dump_$(date +\%F).sql.bz2 Dump only select tables mysqldump -u... -p... mydb t1 t2 t3 > mydb_tables.sql

mysql_mariadb_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2026-01-16T10:58:47+00:00

mysql mariadb replication mysql/mariadb troubleshooting mount namespacing If you get this error Jul 14 13:00:20 mariadb systemd[1]: Starting MariaDB 10.3.15 database server... Jul 14 13:00:21 mariadb systemd[1296]: mariadb.service: Failed to set up mount namespacing: Permission denied Jul 14 13:00:21 mariadb systemd[1296]: mariadb.service: Failed at step NAMESPACE spawning /usr/sbin/mysqld: Permission denied Jul 14 13:00:21 mariadb systemd[1]: mariadb.service: Main process exited, code=exit…

mysql_miscellaneous_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:30:49+00:00

mysql mariadb sql mysql miscellaneous commands Create user and grant rights GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,REFERENCES,ALTER,INDEX on db_name.* TO 'user'@'localhost' IDENTIFIED BY 'password' FLUSH PRIVILEGES; Show grants for user SHOW GRANTS FOR 'user'@'localhost';

mysql_promote_slave_master

Anonymous (anonymous@undisclosed.example.com) — 2022-10-15T10:13:36+00:00

mysql replication Mysql promote slave to master 1. On master: stop the application using the mysql DB 2. On slaves: STOP SLAVE IO_THREAD; SHOW PROCESSLIST; –> has to show message "Has read all relay log" 3. On slave which will be the new master: STOP SLAVE; RESET MASTER;

mysql_query_logging

Anonymous (anonymous@undisclosed.example.com) — 2021-04-29T14:53:46+00:00

sql mysql mariadb mysql query logging On mysql command line SET global general_log_file='/var/log/mysql/my_query_log.log'; SET global general_log = on; SET global log_output = 'file'; When finished turn it off SET global general_log = off; Slow queries 1. Check and enable query logging

mysql_upgrade_debian_9_10

Anonymous (anonymous@undisclosed.example.com) — 2021-04-30T11:13:20+00:00

mariadb mysql troubleshooting Mysql upgrade from Debian 9 to Debian 10 You might get error like this [ERROR] Incorrect definition of table mysql.event: expected column 'sql_mode' at position 14 to have type set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','IGNORE_BAD_TABLE_OPTIONS','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB','NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40','ANSI','N…

nagios_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-04-12T14:00:58+00:00

nagios php debian troubleshooting Nagios troubleshooting Nagios not working after Debian upgrade? Apache is probably not executing php files properly. Make sure the apache modules are enabled. Screenshots of error: Firefox (something probably cached from before) Chrome fresh navigation to page

neovim_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-02-08T09:06:32+00:00

vim neovim nvim troubleshooting Neovim troubleshooting Cloning into '/home/antisa/.local/share/nvim/lazy/vim-rhubarb.git'... fatal: could not read Username for 'https://github.com': terminal prompts disabled Happened when using Lazy neovim plugin and had .git suffix in config:

networkmanager_can_connect_openvpn

Anonymous (anonymous@undisclosed.example.com) — 2026-02-03T15:08:11+00:00

ubuntu linux desktop openvpn vpn troubleshooting NetworkManager can't connect to openvpn Cannot ioctl TUNSETIFF tun When connecting via terminal and you get this error: Note: Cannot ioctl TUNSETIFF tun: Operation not permitted (errno=1) And in logs: Options error: --key fails with '/home/user/pathto/VPN/some.key': No such file or directory (errno=2)

network_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-12-17T12:20:06+00:00

network troubleshooting ipv4 ipv6 network troubleshooting RTNETLINK answers: Cannot assign requested address If it happens when trying to remove de ip address e.g ip addr del 2a01:xxxx:xxxx:xxxx::2 dev enp35s0 try specifying the subnet mask like so ip addr del 2a01:xxxx:xxxx:xxxx::2/64 dev enp35s0

new_host_setup_-_windows

Anonymous (anonymous@undisclosed.example.com) — 2022-07-26T09:21:58+00:00

raid icinga nagios monitoring windows megaraid New host setup - windows Download and Install nsclient++ Example of C:\Program Files\NSClient++\nsclient.ini: # If you want to fill this file with all available options run the following command: # nscp settings --generate --add-defaults --load-all # If you want to activate a module and bring in all its options use: # nscp settings --activate-module --add-defaults # For details run: nscp s…

new_icinga_host_setup_linux

Anonymous (anonymous@undisclosed.example.com) — 2021-03-31T11:12:57+00:00

icinga nagios monitoring New icinga host setup - linux Prepare icinga client adduser --gecos nagios --disabled-password --disabled-login nagios On RedHat/CentOS: adduser nagios Install plugins aptitude install nagios-plugins OR aptitude install nagios-plugins-basic nagios-plugins-standard aptitude install libnagios-plugin-perl (stretch: apt install libmonitoring-plugin-perl)

nfo_file_examples

Anonymous (anonymous@undisclosed.example.com) — 2025-12-28T09:29:10+00:00

nfo movies kodi jellyfin tv nfo file examples Kodi You won't need below if you name the folders as per Kodi's naming scheme i.e Movie name (year). Example for TV Series with example structure: antisa@antisa-desktop:/mnt/nas/Serije$ tree -d Earth\ Final\ Conflict\ -\ Season\ 1-5\ $All\ seasons$/ Earth Final Conflict - Season 1-5 (All seasons)/ ├── Earth Final Conflict - Season 1 ├── Earth Final Conflict - Season 2 ├── Earth Final Conflict - Season 3 ├── Earth Final Conflict - Season 4 ├─…

nginx_caching

Anonymous (anonymous@undisclosed.example.com) — 2024-06-10T14:36:57+00:00

nginx webserver cache Nginx caching Example configuration of caching. Below should be in http context somewhere proxy_cache_path /var/cache/nginx/mycache levels=1:2 keys_zone=de:100M max_size=1G; Below is valid in http, server, location contexts. You might want to add

nginx_http_https_config

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:26:29+00:00

webserver nginx nginx http to https config Non-http file config server { server_name example.com; listen 80; return 301 https://$host$request_uri; Example https config: server { listen 443 default_server ssl; listen [::]:443 default_server ssl ipv6only=on; # SSL encryption parameters ssl on; ssl_protocols TLSv1.2; ssl_session_cache shared:SSL:10m; ssl_session_timeout 10m; ssl_prefer_ser…

nginx_logs_parsing_commands

Anonymous (anonymous@undisclosed.example.com) — 2024-07-22T10:32:20+00:00

nginx bash logs nginx logs parsing commands Find all nginx log files from no extension up to .14.gz # find . -regex '.*/https_www_access.log$\.1\|\.[0-9]\.gz\|\.1[0-4]\.gz$?$' -exec ls {} \; ./https_www_access.log.1 ./https_www_access.log.5.gz ./https_www_access.log.14.gz ./https_www_access.log.2.gz ./https_www_access.log.7.gz ./https_www_access.log ./https_www_access.log.10.gz ./https_www_access.log.8.gz ./https_www_access.log.12.gz ./https_www_access.log.6.gz ./https_www_access.log.9.gz …

nginx_log_parsing

Anonymous (anonymous@undisclosed.example.com) — 2022-04-14T09:41:53+00:00

nginx log nginx log parsing Get number of request per second by country if you have geoip logging enabled, with log line looking like this "14/Apr/2022:00:01:29 +0200" client=114.119.147.209 country=CN is_bot=1 method=GET request="GET /marken/giorgio-armani/kurzarmhemden/ HTTP/1.1" request_length=414 status=200 bytes_sent=37876 body_bytes_sent=37376 referer=- user_agent=Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https:…

nginx_proxy_pass_different_domain_k8s

Anonymous (anonymous@undisclosed.example.com) — 2025-02-19T15:12:42+00:00

k8s kubernetes pulumi nginx nginx proxy pass to a different domain in k8s This is applicable when using the nginx ingress controller. Since k8s already uses the proxy_pass from the backend directive, you can't overwrite this. The solution is to use server-snippet annotation. Let's say you need to proxy pass the example.org/foo

nginx_redirect_rewrites

Anonymous (anonymous@undisclosed.example.com) — 2023-01-11T13:43:21+00:00

nginx proxy Example of redirect and rewrites Redirect root path Redirect from example.com to example.com/it first then to some proxy app. This will preserve any URI after example.com, for example example.com/images/image1.png will become example.com/it/images/image1.png

nginx_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2026-03-18T10:17:59+00:00

nginx troubleshooting webserver ssl Nginx troubleshooting upstream SSL certificate verify error: (21:unable to verify the first certificate) while SSL handshaking to upstream Happened when connecting to upstream server using the self-signed certificate. Workaround can be to set proxy_ssl_verify

node_js_test_web_app

Anonymous (anonymous@undisclosed.example.com) — 2021-08-19T08:13:12+00:00

node javascript node.js test web app Create separate directory: mkdir server && cd server Make server.js file with following content: const express = require('express') const app = express() const port = 3000 app.get('/', (req, res) => { res.send('Hello World!') }) app.listen(port, () => { console.log(`Example app listening at http://localhost:${port}`) })

node_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-03-18T13:21:41+00:00

troubleshooting node npm nvm node troubleshooting globalThis is not defined Error when trying to run soketi on Ubuntu 20.04 server: /usr/local/lib/node_modules/@soketi/soketi/node_modules/nats/lib/src/mod.js:37 if (typeof globalThis.crypto === "undefined") { ^ ReferenceError: globalThis is not defined at Object. (/usr/local/lib/node_modules/@soketi/soketi/node_modules/nats/lib/src/mod.js:37:1) at Module._compile (internal/modules/cjs/loader.js:778:30) at Object.Modul…

nomad_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2026-04-14T09:01:24+00:00

nomad consul hashicorp troubleshooting Nomad troubleshooting executable file not found in $PATH This error happens when running a job that requires envoy: envoy_bootstrap: error creating bootstrap configuration for Connect proxy sidecar: exec: "consul": executable file not found in $PATH

nomad_volumes

Anonymous (anonymous@undisclosed.example.com) — 2026-04-14T09:04:31+00:00

nomad hashicorp volumes Nomad volumes Static volume Define these on the client node. # cat /etc/nomad/nomad.hcl data_dir = "/var/lib/nomad" bind_addr = "192.168.56.109" client { enabled = true servers = ["192.168.56.105", "192.168.56.106", "192.168.56.107"] host_volume "my-data-volume" { path = "/opt/hashicorp" read_only = false } }

obtain_letsencrypt_certificate_domain_multiple_ips

Anonymous (anonymous@undisclosed.example.com) — 2023-03-20T12:32:29+00:00

letsencrypt ssl nginx Obtain letsencrypt certificate for domain with multiple IPs This is a workaround when you have a single domain example.com pointing to 2 or more servers i.e. IPs. You need to redirect the letsencrypt validation to a different subdomain which points to a single server IP. Example in nginx:

openmediavault_nas_share_setup

Anonymous (anonymous@undisclosed.example.com) — 2025-11-16T21:45:59+00:00

nas omv openmediavault share samba nfs Openmediavault NAS share setup First install dependencies: sudo apt-get install rpcbind nfs-common In Storage create a new share then enable NAS in OMV in Services > NFS > Settings: NFS user permissions are based on user ID (UID). UIDs of any users on the client must match those on the server in order for the users to have access.

opensearch_installation

Anonymous (anonymous@undisclosed.example.com) — 2025-03-05T14:59:35+00:00

elasticsearch kibana opensearch Opensearch installation Docker install Execute these on host machine first: echo "vm.max_map_count=262144" >> /etc/sysctl.conf add plugins.security.ssl.http.enabled=false to environment key in compose file, to disable ssl. Set initial password export OPENSEARCH_INITIAL_ADMIN_PASSWORD=mypwd_1

openssl_commands

Anonymous (anonymous@undisclosed.example.com) — 2025-10-16T08:46:35+00:00

ssl cli Openssl commands Check CSR openssl req -text -noout -verify -in google.com.csr Get cert expiration date from cert file openssl x509 -enddate -noout -in /etc/letsencrypt/live/example.com/cert.pem Verfiy certs openssl verify -CAfile certs/rootCA.crt certs/client.crt

openvpn_installation

Anonymous (anonymous@undisclosed.example.com) — 2025-03-03T16:15:10+00:00

vpn openvpn Openvpn installation Install apt install openvpn Enable ip forwarding echo 1 > /proc/sys/net/ipv4/ip_forward Simple setup with static key This simple setup with static key is really only usable with single client and server, unless you want to run separate openvpn instances on different server ports with different server configurations.

open_markdown_firefox_file_manager

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:38:29+00:00

markdown desktop Open markdown in Firefox from file manager Install pandoc sudo apt-get install pandoc Configure custom action command (Thunar example): pandoc -s -o /tmp/temporary.html %f; firefox /tmp/temporary.html Tested on * See also References

output_megacli_predictive_error

Anonymous (anonymous@undisclosed.example.com) — 2022-10-15T10:06:17+00:00

megacli raid output megacli predictive error Unconfigured means its in offline state and the disk can be replaced: ~# megacli -PDList -aAll | egrep "Enclosure Device ID:|Slot Number:|Inquiry Data:|Error Count:|state" Enclosure Device ID: 252 Slot Number: 0 Media Error Count: 0 Other Error Count: 0 Firmware state: Online, Spun Up Inquiry Data: HITACHI HUC109090CSS600 A5B0KPV3WH0F Enclosure Device ID: 252 Slot Number: 1 Media Error Count: 0 Other Error Count: 32 Firmware state: Unc…

ovpn_file_example

Anonymous (anonymous@undisclosed.example.com) — 2024-06-10T08:27:50+00:00

openvpn example ovpn file example dev tun proto tcp-client remote vpn_server_ip 1194 # route to access local network (192.168.190.0) # from vpn client network (10.21.21.1) route 192.168.10.0 255.255.255.0 10.21.21.1 # tunnel all traffic through vpn redirect-gateway def1 tls-client user nobody group nogroup #comp-lzo # Do not use compression. # More reliable detection when a system loses its connection. ping 15 ping-restart 45 ping-timer-rem persist-tun persist-key mute-replay-warning…

password_protect_nginx_site

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:14:22+00:00

nginx webserver Password protect nginx site Install the apache2-utils package on your server by typing: apt-get update && apt-get install apache2-utils The first time we use this utility, we need to add the -c option to create the specified file. We specify a username (sammy in this example) at the end of the command to create a new entry within the file:

password_protect_site_htaccess

Anonymous (anonymous@undisclosed.example.com) — 2022-04-17T10:47:34+00:00

webserver apache Password protect site with htaccess in Apache Create the Password File apt-get install apache2-utils htpasswd -c /etc/apache2/.htpasswd In vhost conf add: AuthType Basic AuthName "Restricted Content" AuthUserFile /etc/apache2/.htpasswd Require valid-user

play_multigigabyte_asciinema_recordings

Anonymous (anonymous@undisclosed.example.com) — 2023-06-05T12:42:31+00:00

asciinema terminal Play multigigabyte asciinema recordings Asciinema will not be able to play very large recordings in web browser, however playing in terminal should work. A workaround is to split the file to multiple smaller files example: split -b 50M --additional-suffix=.cast 2023-05-31_15-14-30.cast

prevent_programm_from_logging_to_daemon.log

Anonymous (anonymous@undisclosed.example.com) — 2022-03-04T12:34:29+00:00

logging rsyslog Prevent programm from logging to daemon.log If you have a programm that is constantly writing to /var/log/daemon.log you can prevent it like this. Example of log message: Mar 4 13:23:54 serverhostname annoyingprogramm[596417]: 2022/03/04 13:23:54 Found connection for client

prijava_na_gradanin_preko_osobne

Anonymous (anonymous@undisclosed.example.com) — 2025-07-21T17:26:23+00:00

smart_card chrome e-gradanin Prijava na e-građanin preko e-osobne koristeći smart card čitač Instaliraj Chrome Browser mora biti Debian paket. Instaliraj Certilia aplikaciju. Aktiviraj e-osobnu preko Certilia client ako već nisi. Prikopčaj smart card reader s osobnom. Zatvori sve browsere i u terminalu dodaj Certilia certifikate u Chrome store (on koristi Firefoxov store isto):

private_docker_registry

Anonymous (anonymous@undisclosed.example.com) — 2024-01-10T15:52:55+00:00

docker registry hub repository Private docker registry Example docker compose file: version: '3' services: registry: restart: unless-stopped image: registry:2 container_name: docker-registry environment: - TZ=Europe/Zagreb - REGISTRY_STORAGE_DELETE_ENABLED=true ports: - 127.0.0.1:5000:5000 volumes: - docker-registry:/var/lib/registry volumes: docker-registry: driver: local

problem_restoring_dejadup_backup

Anonymous (anonymous@undisclosed.example.com) — 2020-12-02T16:25:02+00:00

backup Problem restoring DejaDup backup? If you get error similar to “Volume doesn't implement mount” set the backup location in the DejaDup preferences first. Tested on * See also References

proftpd_setup

Anonymous (anonymous@undisclosed.example.com) — 2021-03-29T14:11:31+00:00

ftp Proftpd setup Install ProFTPD (as standalone) apt-get install proftpd Edit /etc/proftpd/proftpd.conf UseIPv6 off # limit user to their home dir (/var/www in this case) DefaultRoot ~ ftpgrp RequireValidShell off PassivePorts 65504 65534 DenyGroup !ftpgroup

proxmox_lxc_guest_internet_access

Anonymous (anonymous@undisclosed.example.com) — 2022-10-29T11:24:42+00:00

vm virtualization networking proxmox Proxmox lxc guest internet access Go to Virtualbox > Proxmox VM > Settings > Network > Adapter 1 Attached to Bridged Adapter > Advanced > Promiscuous Mode > Allow All. Setup guest in Proxmox with static IP: Gateway is IP of Proxmox VM itself. DHCP should work also.

proxying_dns_name_local_service

Anonymous (anonymous@undisclosed.example.com) — 2022-02-28T15:11:00+00:00

dns proxy apache webserver Proxying DNS name to local service Enable apache modules first a2enmod proxy proxy_http vhost configuration example for service running on port 8080 Part to be added: ServerName sub.example.com ProxyPreserveHost On ProxyPass / http://localhost:8080/ ProxyPassReverse / http://localhost:8080/

proxy_non_http_traffic_through_nginx

Anonymous (anonymous@undisclosed.example.com) — 2022-12-16T15:23:50+00:00

nginx webserver docker proxy Proxy non-http traffic through nginx Example if you have a docker container running and it is listening for UDP traffic. Make sure nginx.conf includes the following at the end of file: stream { include /etc/nginx/streams-enabled/*; } Then in

proxy_pass_nginx_connection_using_self_signed_certificates

Anonymous (anonymous@undisclosed.example.com) — 2022-07-20T11:24:06+00:00

nginx ssl letsencrypt Proxy pass nginx connection using self-signed certificates This is when the domain itself is using letsencrypt certificates but the the connection is proxied to a different server by ssl with self-signed certs. Create the certificates first. Frontend server configuration

puppet_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-12-01T14:49:07+00:00

puppet troubleshooting Puppet troubleshooting Error: The certificate for 'CN=server-hostname.com' does not match its private key Error happens when running puppetclient ~# puppet agent -t Happens on new server or reinstalled server with puppet when private key changes.

pxe_booting_over_local_network_mikrotik

Anonymous (anonymous@undisclosed.example.com) — 2025-06-25T11:07:13+00:00

pxe mikrotik netbootxyz PXE booting over local network with Mikrotik Setup: netboot.xyz running on a raspberry pi on IP 192.168.99.134 as docker container ~# docker ps ... 90dfa510f846 ghcr.io/netbootxyz/netbootxyz "sh /start.sh" 18 months ago Up 2 weeks 0.0.0.0:69->69/udp, [::]:69->69/udp, 0.0.0.0:3000->3000/tcp, [::]:3000->3000/tcp, 0.0.0.0:8080->80/tcp, [::]:8080->80/tcp netbootxyz

python

Anonymous (anonymous@undisclosed.example.com) — 2020-11-28T16:06:42+00:00

Kivy

python_error_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-05-06T08:46:00+00:00

python troubleshooting pip Python error troubleshooting pytoml.core.TomlError ~# python3 -m pip install lxml Collecting lxml Using cached https://files.pythonhosted.org/packages/ea/e2/3834472e7f18801e67a3cd6f3c203a5456d6f7f903cfb9a990e62098a2f3/lxml-5.2.1.tar.gz Exception: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/pip/_internal/cli/base_command.py", line 143, in main status = self.run(options, args) File "/usr/lib/python3/dist-packages/pip/_internal/co…

python_locale_problem

Anonymous (anonymous@undisclosed.example.com) — 2021-05-19T12:14:44+00:00

python Python locale problem If you get this error or smth similar: UnicodeEncodeError: 'ascii' codec can't encode character '\u010c' in position 61: ordinal not in range(128) Make sure the server has the locale set up correctly, usually it is enough to uncomment (en_US.UTF-8 UTF-8 and/or hr_HR.UTF-8 UTF-8):

python_pandas_dictionary_grouping

Anonymous (anonymous@undisclosed.example.com) — 2022-06-29T11:09:12+00:00

python pandas code Python pandas dictionary grouping If you have a list of dictionaries that are going to be exported to a csv file and the items need to be divided in groups and subgroups use the snippet below. Example list of dictionaries: example_dicts = [ {'RetailerId': 1234, 'Retailer': 'Cool retailer 1', 'custom Retailer': 'no', 'Tag': '', 'Subtag': 'accessoires', 'Click Costs': 0.2, 'Total Costs': 'N/A', 'Brand': 1}, {'RetailerId': 4321, 'Retailer': 'Cool retailer 1 Clothing', 'cust…

query_google_cloud_logs

Anonymous (anonymous@undisclosed.example.com) — 2022-08-11T11:03:24+00:00

google bigquery log Query Google cloud logs Login to Google console cloud and select the project from dropdown list and find the “Logging” product in hamburger menu (it's pinned here in the scrot, you will need to scroll down) This should open the logs explorer, where you need to select the

raspberry_pi_set_static_ip

Anonymous (anonymous@undisclosed.example.com) — 2023-12-26T17:51:45+00:00

raspberry pi networking Raspberry Pi set static ip Debian 12 Bookworm nmcli c m "Wired connection 1" ipv4.addresses 192.168.99.134/24 ipv4.method manual && nmcli c m "Wired connection 1" ipv4.gateway 192.168.99.11 && nmcli c m "Wired connection 1" ipv4.dns 192.168.99.11 && nmcli c down "Wired connection 1" && nmcli c up "Wired connection 1"

receive_dmarc_reports_different_domain

Anonymous (anonymous@undisclosed.example.com) — 2021-04-07T11:05:43+00:00

mail dns Receive dmarc reports to different domain Add this in your dns foobar.com zone file: example.com._report._dmarc TXT "v=DMARC1;" This is External Destination Verification. You can now receive DMARC reports for example.com domain to foobar.com email address.

record_terminal_sessions

Anonymous (anonymous@undisclosed.example.com) — 2023-06-05T12:35:53+00:00

terminal script logging recording Record terminal sessions Multiple ways to log terminal sessions in file. Add to end of .bashrc to start recording session when you open the terminal. script program We test for shell's parent process not being script and then run script test "$(ps -ocommand= -p $PPID | awk '{print $1}')" == 'script' || (script -f $HOME/Documents/terminal_logs/$(date +"%d-%b-%y_%H-%M-%S")_shell.log)

recycleview_code_examples

Anonymous (anonymous@undisclosed.example.com) — 2022-06-29T11:08:30+00:00

python kivy Kivy code examples Click on image to see code for that. RecycleView Scrollable buttons. kivy_recycle_view1 See this code if you want custom size of buttons (or any other widgets). GridLayout Grid layout that has fixed button size regardless of the window size. fixed_btn_size Tested on

redirect_another_site_query_parameter_nginx

Anonymous (anonymous@undisclosed.example.com) — 2022-09-23T11:55:55+00:00

nginx query_parameter redirect proxy Redirect to another site from query parameter in nginx If you have an URL for example: https://sub.domain.com/some_image?src=https://www.someotherdomain.com/file/thumbnail/blahblah/43433/image.jpg You can do a redirect to a URL in the src parameter by using below in nginx when visiting above

redis_replication_setup

Anonymous (anonymous@undisclosed.example.com) — 2025-12-16T13:30:10+00:00

db replication redis redis replication setup In order for replication to work, you need to have at least 3 instance on redis on different servers preferrably. 2 of those server have to have ... replicaof 6379 ... in their config files. The master must not have that line when starting.

reinstall_grub_mdraid1_array

Anonymous (anonymous@undisclosed.example.com) — 2024-04-05T14:58:27+00:00

grub raid mdraid troubleshooting boot debian Reinstall grub on mdraid1 array Upon rebooting the server after upgrade from Debian 8->9->10 you get dropped in a grub rescue prompt like this and with an error like grub2 error: symbol `grub_calloc' not found Boot up a rescue system like a Debian live CD. Then:

remmina_tools_when_right_clicking

Anonymous (anonymous@undisclosed.example.com) — 2020-11-28T17:43:15+00:00

ssh remmina terminal Fix Remmina right click tools If the tools in below screenshot don't work install the gnome-terminal first sudo apt install gnome-terminal then change the /usr/share/remmina/external_tools to look like below #!/bin/sh #################### # Main Script #################### #gnome-terminal -e $(dirname $0)/$1 # if [ -x "/usr/bin/x-terminal-emulator" ]; # then # TERMNAME="/usr/bin/x-terminal-emulator" # else # TERMNAME="gnome-terminal" # fi TERMNAME="gnome-terminal"…

remove_don_have_valid_subscription

Anonymous (anonymous@undisclosed.example.com) — 2021-05-19T11:53:04+00:00

proxmox virtualization Remove you don't have valid subscription sed -i.bak 's/NotFound/Active/g' /usr/share/perl5/PVE/API2/Subscription.pm && systemctl restart pveproxy.service Above creates a backup file of Subscription.pm Tested on * See also References

remove_first_letter_files_add_other_character

Anonymous (anonymous@undisclosed.example.com) — 2022-10-29T11:30:48+00:00

bash commands cli Remove first letter from files and add other character Remove first character: for f in *; do mv "$f" "${f:1}"; done Add 8 to filename: for f in *; do mv "$f" "8$f"; done Tested on * See also References

rename_mysql_database

Anonymous (anonymous@undisclosed.example.com) — 2022-10-29T11:31:54+00:00

mysql Rename mysql database mysqladmin -u username -p create newdatabasemysqldump -u username -v olddatabase -p | mysql -u username -p -D newdatabase Tested on * See also References *

resize_lvm_partition_used_by_vm

Anonymous (anonymous@undisclosed.example.com) — 2025-10-21T11:59:06+00:00

lvm partitioning Resize LVM partition used by a VM Setup: You have a host server which has a PV volume and lots of different LV volumes used by different qemu-kvm VMs. You want to expand the disk of test1.1.1.1.1 VM (called a domain in virsh speak). First find the VM via

restrict_microsoft_teams_groups_creation

Anonymous (anonymous@undisclosed.example.com) — 2021-04-21T11:24:48+00:00

windows powershell microsoft Restrict Microsoft Teams or Groups creation Connect to AzureAD first via powershell. Start the Powershell as admin first. Before running the script you need to check if you can execute the scripts on Windows: Get-ExecutionPolicy -List If it's undefined allow the current user to execute the scripts:

resync_monero_wallet_specific_height

Anonymous (anonymous@undisclosed.example.com) — 2025-10-29T11:35:46+00:00

monero cryptocurrency bitcoin Resync monero wallet from specific height You can check the height to date mappings here or here Now use monero-wallet-cli --wallet-file mywallet Then use one of the following commands: a) Full rescan from block 0 rescan_bc This tells the wallet to forget all cached transactions and re-scan the entire blockchain. ⚠️ It will take time (especially if you start from genesis).

retro_gaming

Anonymous (anonymous@undisclosed.example.com) — 2022-07-09T15:40:17+00:00

gaming Retro gaming Install retropi via script on Raspberry pi or manually for x86 machines. A helpful program to manage games and add them in Steam is steam rom manager. Gamecube/Wii emulation Install emulator first, run sudo retropie_setup.sh script and go to Manage packages > Manage experimental packages > Dolphin

revoke_openvpn_certificates

Anonymous (anonymous@undisclosed.example.com) — 2025-03-04T13:28:16+00:00

vpn openvpn Revoke openvpn certificates To disable specific users from connecting to the VPN you can revoke their certificate. This assumes you have easy-rsa installed. Basically you need to revoke each certificate according to its CN name (should be same as filename) and recreate the

rewrite_rule_examples

Anonymous (anonymous@undisclosed.example.com) — 2021-07-09T08:07:49+00:00

apache Apache rewrite rule examples Rewrite from one domain to other including the trailing slash RewriteCond %{REQUEST_URI} ^pdf\.example\.com(/*)$ [OR] RewriteRule ^ https://subdomain.newexample.com [NE,R=permanent] This will rewrite “pdf.example.com”

rollover_opensearch_elasticsearch_indexes

Anonymous (anonymous@undisclosed.example.com) — 2024-09-03T11:35:19+00:00

elasticsearch elk opensearch logging Rollover opensearch/elasticsearch indexes Datastream indexes In index management create a new policy. Most important is to match the index pattern with the name of your datastreams e.g. below we see a regex that will match datastreams as defined in

rsync_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-10-29T12:23:40+00:00

rsync troubleshooting rsync troubleshooting SSH agent and rsync Using rsync in crontab of different user than root requires adding additional ENV variables. Example: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin SSH_AUTH_SOCK=/run/user/1000/keyring/ssh

rundeck_add_new_role_acl_policy

Anonymous (anonymous@undisclosed.example.com) — 2024-05-13T09:39:49+00:00

rundeck acl Rundeck add new role ACL policy Log in to rundeck and go to Settings > Access control > Create ACL policy and paste the ACL configuration. Here is an example for “editor” role user having access to Backend project and being able to run “Sync”

rundeck_add_remote_node

Anonymous (anonymous@undisclosed.example.com) — 2022-06-23T09:01:50+00:00

rundeck ssh docker Rundeck add remote node This example has a rundeck running in a docker container with a volume path set to /home/rundeck/server/data Add private key Must be in rsa format which begins like -----BEGIN RSA PRIVATE KEY----- xxxxxxx You likely have openssh format

rundeck_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-07-15T09:34:23+00:00

troubleshooting rundeck java Rundeck troubleshooting Cannot run program "/bin/sh" (in directory "/var/lib/rundeck"): error=0, Failed to exec spawn helper Restart rundeckd service: systemctl restart rundeckd Tested on * See also * Jenkins troubleshooting References

run_borgbackup_each_day

Anonymous (anonymous@undisclosed.example.com) — 2023-04-12T10:17:29+00:00

anacron cron Run anacron in user mode You can set up a separate anacron instance to run in user mode: 1. Create a .anacron folder in your home directory and in it two subfolders, etc and spool: mkdir -p ~/.anacron/{etc,spool} 2. Create a new file ~/.anacron/etc/anacrontab with contents similar to the following:

samba_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-05-09T08:12:13+00:00

network_storage samba cifs hetzner samba troubleshooting mount error(115): Operation now in progress Full error: mount error(115): Operation now in progress Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) This could happen if it tries to mount via dns name and it resolves to IPv6 e.g. example from fstab:

save_iptables_rules_clear_firewall

Anonymous (anonymous@undisclosed.example.com) — 2025-10-08T11:14:13+00:00

firewall iptables shorewall Save iptables rules and clear firewall Useful for debugging. First, save the current firewall config: iptables-save > /root/firewall.rules ip6tables-save > /root/firewall6.rules Then, flush and open all the firewall rules using the following commands:

script_convert_images_webp_jpeg

Anonymous (anonymous@undisclosed.example.com) — 2023-07-14T08:41:28+00:00

jpeg jpg webp imagemagick convert images Script to convert images from webp to jpeg #!/bin/bash # requires imagemagick package # apt install imagemagick IMAGE_DIR='/home/antisa/ncimages' WEBPS=($(find ${IMAGE_DIR} -type f -name '*xxl.webp')) JPEGS=($(find ${IMAGE_DIR} -type f -name '*xxl.jpeg')) for WEBP_IMAGE in ${WEBPS[@]} do if [[ "${JPEGS[@]}" =~ "${WEBP_IMAGE%.*}.jpeg" ]]; then echo "Image already converted to jpeg, skipping..." else echo ">>>>>>>>>>>>>>> Converting ${WEBP_…

search_google_selected_text

Anonymous (anonymous@undisclosed.example.com) — 2021-10-16T16:50:09+00:00

google desktop keyboard_shortcuts Search google for selected text Google from anywhere Install Ubuntu sudo apt install xclip Archu Install xbindkeys and run xbindkeys_config in terminal. Xubuntu Install xsel Add script to keyboard shortcuts Ubuntu sh -c 'firefox "https://www.google.com/search?q=$(xclip -o)"'

self_hosting_mail_tips

Anonymous (anonymous@undisclosed.example.com) — 2021-04-14T11:11:53+00:00

mail self-hosting Self-hosting mail tips From: It's not “easy” but it's probably not as hard as a lot of people make it out to be. I've hosted my own mail servers for years and if you tick off all the boxes on your setup you should be okay. When you say you've got a clean IP, have you run it through an RBL checker or three? If you're doing both IPv4 and IPv6, be sure to check both.

send_delayed_mail_via_laravel_queue

Anonymous (anonymous@undisclosed.example.com) — 2021-02-02T10:44:40+00:00

mail php laravel Send delayed mail via Laravel queue Change DB driver In .env file put QUEUE_DRIVER=database insted of QUEUE_DRIVER=sync Run queue in background nohup php artisan queue:work --daemon & Tested on * Debian 10.7 * PHP 7.3.19-1~deb10u1 * Laravel Framework 5.6.15

send_mail_php_laravel_swiftmailer_using_microsoft_smtp_office365

Anonymous (anonymous@undisclosed.example.com) — 2021-04-08T13:34:15+00:00

php mail laravel microsoft Send mail with PHP Laravel/swiftmailer using Microsoft smtp.office365.com In .env file change “MAIL_ENCRYPTION=starttls” to “MAIL_ENCRYPTION=tls” In conf/mail.php, line 59 set MAIL_FROM_ADDRESS to be same as in .env file MAIL_USERNAME value

send_mail_raspberrypi

Anonymous (anonymous@undisclosed.example.com) — 2023-12-26T17:52:08+00:00

mail raspberrypi Send mail from raspberrypi using Gmail 1. Turn on 2-factor authentication in Google and generate the app password which will be used by the pi. 2. Install packages: sudo apt-get install msmtp msmtp-mta mailutils 3. Put the following in /etc/msmtprc # Generics defaults auth on tls on # following is different from ssmtp: tls_trust_file /etc/ssl/certs/ca-certificates.crt # user specific log location, otherwise use /var/log/msmtp.log, however, # this will …

send_query_result_html_email

Anonymous (anonymous@undisclosed.example.com) — 2021-04-30T11:18:42+00:00

mysql mariadb email Send query result as html email Install mutt apt-get install mutt example query mysql --html -uroot -p mydb -e 'select month(timestamp) as "Month", day(timestamp) as "Day" ,count(*) from table1' | mutt -e "set content_type=text/html" -s 'Mysql daily report' user@email.org

send_test_email_server

Anonymous (anonymous@undisclosed.example.com) — 2021-04-14T11:16:13+00:00

mail Send test email from server Install mail package first. Send mail from server: echo "This is a test." | mail -s Test user@example.com Tested on * See also * Send test email via php References

send_test_email_via_php

Anonymous (anonymous@undisclosed.example.com) — 2021-04-14T11:15:43+00:00

mail php Send test email via php Create the test-email.php script with the following:

sentry_backup

Anonymous (anonymous@undisclosed.example.com) — 2023-08-31T11:26:20+00:00

monitoring logging backup Backup sentry For version before 23.3.1 run this from self-hosted-sentry directory: chmod o+w sentry docker-compose run -v $(pwd)/sentry:/sentry-data/backup --rm -T -e SENTRY_LOG_LEVEL=CRITICAL web export /sentry-data/backup/backup.json mv sentry/backup.json /root/sentry-config-backup_$(date +%F).json

sentry_install

Anonymous (anonymous@undisclosed.example.com) — 2024-08-26T09:30:56+00:00

monitoring logging Sentry install Follow this guide . You need to generate the secret key and add it to config. You can use some password generator for that with long string of random characters like this password: yc;"2YWZ~AKu9=B`[+.fp2rR(>/6Lk}v To create a user if you did an unattended install like with command

sentry_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-09-25T13:25:31+00:00

troubleshooting sentry postgres sql db Sentry troubleshooting Postgres DB getting too big One option is to truncate the nodestore_node table. Enter the DB: psql -U postgres Check the table size postgres=# SELECT oid::regclass, reltoastrelid::regclass, pg_relation_size(reltoastrelid) AS toast_size FROM pg_class WHERE relkind = 'r' AND reltoastrelid <> 0 ORDER BY 3 DESC;

server_hardening

Anonymous (anonymous@undisclosed.example.com) — 2021-06-04T08:49:26+00:00

linux security wordpress Server hardening General tips * Check all open/listening ports on each server and make sure everything looks ok there (no unexpected connections, etc.) * Get local user accounts on all servers * If SSH is enabled for remote management, I would disable password auth and switch to private key - if already in place, generate a new key

setting_up_website_behind_cloudflare_proxies

Anonymous (anonymous@undisclosed.example.com) — 2021-03-29T14:25:52+00:00

proxy loadbalancing webserver Setting up a website behind Cloudflare proxies If you are moving a website (Wordpress e.g.) to a new server, after you have transferred the files and database and set up the webserver, you need to enable SSL on your new server as well, because the Cloudflare will refuse to connect to your new server.

setup_certificate_servers_without_root_access

Anonymous (anonymous@undisclosed.example.com) — 2021-05-04T09:01:49+00:00

ssl letsencrypt Setup certificate on servers without root access This is done on your local computer or another server. Install certbot via manual method Get certs locally then copy them on server user@host:/tmp$ certbot-auto certonly --manual --preferred-challenges http -d www.example.org -d example.org Requesting to rerun ./certbot-auto with root privileges... Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator manual, Installer None …

set_bash_prompt_fqdn

Anonymous (anonymous@undisclosed.example.com) — 2022-11-01T10:07:19+00:00

bash shell Set bash prompt to FQDN Set FQDN in /etc/hosts: 127.0.1.1 www.example.org example.org Run script that changes hostname in kernel: /etc/init.d/hostname.sh In .bashrc change: if [ "$color_prompt" = yes ]; then PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' else PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ ' fi

set_file_emblem_via_command_line_thunar

Anonymous (anonymous@undisclosed.example.com) — 2021-06-29T12:50:35+00:00

thunar terminal xfce Set file emblem via command line in Thunar Get metadata on location gio info metadata:: path_to/some_file_or_folder Set emblem gio set _path_to/some_file_or_folder_ -t stringv metadata::emblems _emblem_name_ e.g. set green checkmark for emblem in Downloads directory

set_github_status_bamboo

Anonymous (anonymous@undisclosed.example.com) — 2020-11-29T00:33:26+00:00

github atlassian bamboo Set Github status from Bamboo Generate API access token from your Github Profile > Developer Settings > Pesonal Access tokens Use curl to update the status curl -H "Authorization: token "" --request POST --data '{"state": "pending", "context": "build", "description": "Build is running", "target_url": "${bamboo.buildResultsUrl}"}' https://api.github.com/repos///statuses/${bamboo.repository.revision.number} > /dev/null

set_tab_title_xfce4_terminal

Anonymous (anonymous@undisclosed.example.com) — 2021-06-29T12:47:36+00:00

xfce terminal desktop Set tab title in xfce4-terminal Hosts you are connecting to should have this in their .bashrc # If this is an xterm set the title to user@host:dir case "$TERM" in xterm*|rxvt*) PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1" ;; *) ;; esac

set_terminal_title_server_hostname

Anonymous (anonymous@undisclosed.example.com) — 2021-03-23T16:46:31+00:00

terminal bash cli Set terminal title to server's hostname Add to .bashrc file: # If this is an xterm set the title to user@host:dir case "$TERM" in xterm*|rxvt*) PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1" ;; *) ;; esac Tested on

set_up_ipv6_host_vm

Anonymous (anonymous@undisclosed.example.com) — 2025-10-09T12:21:34+00:00

networking ipv6 bridge Set up IPv6 on host and VM Prerequisites: * host with ipv6 subnet assigned * kvm/qemu virtal machines Host machine Identify the interface to which to assign the ipv6. In case you are using a bridge you need to use the bridge interface. Set up bridge (install

sftp_limit_users_home_folder

Anonymous (anonymous@undisclosed.example.com) — 2022-11-01T10:10:25+00:00

ftp ssh sftp limit users to home folder With ssh keys (add user's public key to her home folder) 1. Add to end of /etc/ssh/sshd_config: #Subsystem sftp /usr/lib/openssh/sftp-server Subsystem sftp internal-sftp -f AUTH -l VERBOSEMatch group sftp ForceCommand internal-sftp ChrootDirectory %h X11Forwarding no AllowTcpForwarding no

shorewall_custom_logging

Anonymous (anonymous@undisclosed.example.com) — 2025-10-10T13:51:41+00:00

firewall logging network shorewall Shorewall custom logging Custom log file First make sure you have logging set. Example in /etc/shorewall/policy #SOURCE DEST POLICY LOG LIMIT: CONNLIMIT: # LEVEL BURST MASK # fw-to-all $FW all ACCEPT - - # net-to-all net all DROP info - # all-to-all all all DROP info - #LAST LINE -- DO NOT REMOVE

shorewall_rate_limiting_requests

Anonymous (anonymous@undisclosed.example.com) — 2025-10-31T11:47:20+00:00

shorewall firewall http requests webserver rate-limit ddos shorewall rate limiting requests Add the following to your rules file: # allow http with rate limit based on src ip ACCEPT net $FW tcp 80 - - s:20/min:30 # allow https with rate limit based on src ip ACCEPT net $FW tcp 443 - - s:20/min:30 Make sure you don't have any rule that accepts traffic on these ports before these rules. Shorewall evaluates rules in the order they are listed in the file.

shorewall_setup

Anonymous (anonymous@undisclosed.example.com) — 2024-04-05T12:00:57+00:00

firewall shorewall setup apt-get install shorewall shorewall6cd /etc/shorewall/cp /usr/share/doc/shorewall/examples/one-interface/{interfaces,policy,rules,zones} .cd /etc/shorewall6/cp /usr/share/doc/shorewall6/examples/one-interface/{rules,interfaces,zones,policy} .

shorewall_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-10-29T15:16:42+00:00

shorewall troubleshooting shorewall troubleshooting WARNING: Version Mismatch: Shorewall-core is version 5.2.3.2, while the Shorewall version is 5.2.4.5 /usr/share/shorewall/coreversion (EOF) Reinstall shorewall: apt-get install --reinstall shorewall TABLE_FLUSH failed (Device or resource busy): table raw ... logger: socket /dev/log: Connection refused

show_zenity_notifcation_string_selection

Anonymous (anonymous@undisclosed.example.com) — 2021-10-17T10:48:06+00:00

zenity ssh notification desktop Show zenity notifcation on string selection Requisite packages Install xclip and zenity if you don't have it: sudo apt install xclip zenity Show hostname Example of showing hostname when IP is selected in primary clipboard. Put the following in script and call it via some keyboard shortcut.

sign_android_apk_terminal

Anonymous (anonymous@undisclosed.example.com) — 2021-02-07T13:01:31+00:00

android Sign android apk from terminal This was used for signing an apk built with buildozer and made with kivy. Create certificate keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000 Migrate keystore to PKCS12

sign_apple_mobileconfig

Anonymous (anonymous@undisclosed.example.com) — 2026-01-21T13:05:32+00:00

apple mobile ssl letsencrypt Sign apple mobileconfig Simplest is to generate a Letsencrypt certificate for your domain e.g. app.example.org and run: $ openssl smime -sign -signer letsencrypt/live/app.example.org/cert.pem -inkey letsencrypt/live/app.example.org/privkey.pem -certfile letsencrypt/live/app.example.org/fullchain.pem -nodetach -outform der -in test.mobileconfig -out test-SIGNED.mobileconfig

small_fonts_gtk_gnome_apps

Anonymous (anonymous@undisclosed.example.com) — 2021-03-31T11:04:07+00:00

i3 windowmanager desktop Small fonts in gtk gnome apps? Change font size in .config/gtk-3.0 Tested on * See also References

smartctl_commands

Anonymous (anonymous@undisclosed.example.com) — 2022-10-08T09:57:14+00:00

disks raid smart smartctl commands smartctl megaraid check smartctl --scan The number indicates the number of disk in array: smartctl -a -d megaraid,2 /dev/sda Tested on * See also * megacli drive rebuild References

snappass_password_sharing_behind_apache2_reverse_proxy

Anonymous (anonymous@undisclosed.example.com) — 2021-04-12T13:51:44+00:00

reverseproxy apache webserver flask Snappass password sharing behind Apache2 reverse proxy Securely share password via web URLs. Clone repository $ pip3 install snappass Install redis caching server $ apt install redis Disable redis dumping of DB to file We don't want to save any keys to the disk, so in

sophos_utm_howtos

Anonymous (anonymous@undisclosed.example.com) — 2024-06-04T14:29:33+00:00

sophos firewall vpn Sophos UTM howtos Adding routes for VPN users to specific IPs First create object definition i.e. new host IP. Go to Definitions & Users > Network Definitions and from dropdown select “Hosts” to see existing hosts objects. To create new select

spining_disk_ssd

Anonymous (anonymous@undisclosed.example.com) — 2022-11-01T10:14:40+00:00

troubleshooting disk Spining disk or SSD? Use this to find out if the disk is regular spinning hard drive or SSD lsblk -d -o name,rota or cat /sys/block/sda/queue/rotational You should get 1 for hard disks and 0 for a SSD. Does not work when the disks are in RAID array. Reports 1.

ssh

Anonymous (anonymous@undisclosed.example.com) — 2020-11-28T14:34:01+00:00

Desktop shortcut to open SSH tunnel and then open Firefox tab Remmina "Tools" when right clicking

ssh_locale_warning

Anonymous (anonymous@undisclosed.example.com) — 2022-10-03T10:15:49+00:00

ssh ssh locale warning Comment out SendEnv LANG LC_* in /etc/ssh/ssh_config on client. Tested on * See also References *

ssh_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-12-14T19:09:12+00:00

ssh mount fstab ssh troubleshooting read: Connection reset by peer Above error happens when trying to mount some disk drive from another server via sshfs. Example from fstab: root@192.168.99.143:/mnt/touro /mnt/touro fuse.sshfs user,x-systemd.automount,defaults,_netdev,allow_other,identityfile=/root/.ssh/id_ed25519 0 0

ssh_tunnel_forwarding

Anonymous (anonymous@undisclosed.example.com) — 2021-06-04T08:51:34+00:00

ssh proxy SSH tunnel port forwarding Access remote resource running on port 5555 locally on port 5001 ssh user@example.com -L 5001:localhost:5555 Then type in web browser Opposite: access local resource on port 3000 over public domain ssh -R 8083:localhost:3000 user@example.com

ssl_peer_certificate_ssh_remote_key_not_ok

Anonymous (anonymous@undisclosed.example.com) — 2023-06-16T12:02:32+00:00

troubleshooting ssl sentry SSL peer certificate or SSH remote key was not OK (sentry-cli) Error below is from the @sentry/cli/sentry-cli tool run via yarn build: SSL peer certificate or SSH remote key was not OK (SSL certificate problem: unable to get local issuer certificate)

stop_vmware_windows_10_freeze_after_shutdown

Anonymous (anonymous@undisclosed.example.com) — 2021-06-29T13:12:14+00:00

vmware virtualization windows Stop VMware windows 10 freeze after shutdown With the virtual machine stopped, first make a backup copy of your .vmx file, then edit it and change the line containing: vmci0.present = "TRUE" to vmci0.present = "FALSE" Tested on * See also References

supermicro_secure_boot_custom_keys

Anonymous (anonymous@undisclosed.example.com) — 2025-08-29T07:38:33+00:00

secure_boot uefi bios supermicro Supermicro Secure Boot custom keys To enroll secure boot custom keys enter the BIOS/UEFI, go to Security > Secure Boot and disable it. You should aim for something like this, UEFI should be in setup mode with SB disabled. Go to Key Management and delete all Vendor variables and enroll your own. You can do it from the mounted ISO file where you have them stored. Press enter on each of the

syntax

Anonymous (anonymous@undisclosed.example.com) — 2024-02-29T09:18:49+00:00

Formatting Syntax DokuWiki supports some simple markup language, which tries to make the datafiles to be as readable as possible. This page contains all possible syntax you may use when editing the pages. Simply have a look at the source of this page by pressing

systemd_journald_uses_lots_ram

Anonymous (anonymous@undisclosed.example.com) — 2021-06-29T12:43:08+00:00

systemd troubleshooting proxmox systemd-journald uses lots of ram If journalctl -f shows smth like this in its output /dev/tty4: cannot open as standard input: No such file or directory this is usually related with running unprivileged containers. In Proxmox just change number of tty-s to 4 (default is 2)

systemd_rsync_service

Anonymous (anonymous@undisclosed.example.com) — 2023-06-27T08:19:39+00:00

systemd backup systemd rsync service /etc/systemd/system/rsync-backup.service: [Unit] Description=Copy home folder to HD on shutdown [Service] Type=oneshot RemainAfterExit=true ExecStop=/home/user/.rsync-to-HD.sh [Install] WantedBy=multi-user.target rsync-to-HD.sh

systemd_user_service

Anonymous (anonymous@undisclosed.example.com) — 2023-04-20T20:15:21+00:00

systemd systemd user service 1. Create user service in user's home directory ex. /home//.config/systemd/user/ Example: [Unit] Description=my npm app After=network.target [Service] ExecStart=/usr/bin/npm start WorkingDirectory=/home/debian/mynpmapp/ Restart=on-failure [Install] WantedBy=default.target

tcpdump_commands

Anonymous (anonymous@undisclosed.example.com) — 2025-11-24T15:35:24+00:00

tcpdump networking troubleshooting tcpdump commands Catch outgoing traffic and exclude mac address tcpdump -Q out -ni enp2s0 ether host not d4:3d:7e:ec:e7:69 and ether host not d4:3d:7e:ec:e7:69 Tested on * See also References

terraform_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2022-11-30T10:18:33+00:00

terraform docker troubleshooting terraform troubleshooting dial tcp 127.0.0.1:80: connect: connection refused Remove state for this module. To get the exact module run terraform state list | grep module.eks.kubernetes_config_map.aws_auth then run rm with full module path which might differ:

test_app_printing_http_headers

Anonymous (anonymous@undisclosed.example.com) — 2026-03-18T10:15:54+00:00

http apache nginx headers python troubleshooting Test app for printing http headers Save this as app.py: from flask import Flask, request, jsonify import logging app = Flask(__name__) # Configure logging to print to stdout (visible in docker logs) logging.basicConfig( level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s' ) logger = logging.getLogger(__name__) @app.route('/') def index(): """Main route that logs headers and returns HTML.""" x_forwarded_for …

triggering_jenkins_build_github_push_event

Anonymous (anonymous@undisclosed.example.com) — 2024-05-15T13:34:13+00:00

webhook jenkins github Triggering Jenkins build on Github push event The user on jenkins needs to have access to the repo. Jenkins needs to have the plugin installed In project configuration then the only thing to do is to check the mark GitHub hook trigger for GITScm polling

tunnel_firefox_connections_through_dynamic_port

Anonymous (anonymous@undisclosed.example.com) — 2023-12-20T09:09:07+00:00

ssh tunnel firefox proxy socks5 Tunnel Firefox connections through dynamic port Open ssh tunnel ssh -p32 -D 8095 root@ Browse through Firefox using above WAN ip Go to Preferences > General > Network Settings > Manual proxy configuration > fill out “SOCKS HOST

turn_off_php_warnings_wordpress

Anonymous (anonymous@undisclosed.example.com) — 2022-01-03T14:40:49+00:00

php wordpress Turn off php warnings for Wordpress Also turns off deprecation warnings. Put this into wp-config.php ini_set('display_errors','Off'); ini_set('error_reporting', E_ALL ); define('WP_DEBUG', false); define('WP_DEBUG_DISPLAY', false); Tested on *

ubuntu_phone_flash

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:29:11+00:00

phone ubuntu mobile Ubuntu phone flash Download flash tool: Install needed dependency: sudo apt install libqtwebkit4 Download firmware:

ubuntu_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2023-12-15T18:29:38+00:00

troubleshooting ubuntu network Ubuntu troubleshooting 22.04 No wired internet - 22.04.2 Network Unclaimed Happened after upgrade from 20.04.04 to 22.04.2, there was no wired connection detected: antisa@antisa-desktop:/etc/netplan$ sudo lshw -C network *-network UNCLAIMED description: Ethernet controller product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:04:00.0 version: 15 width: 64 bits clock: 33MHz …

updateing_azure_database_firewall_via_api

Anonymous (anonymous@undisclosed.example.com) — 2024-04-25T11:15:46+00:00

microsoft azure api Updateing Azure database firewall via Azure API Via bash script. (Install “jq” tool) #!/bin/bash json=$(curl -X POST -H "Content-Type: application/x-www-form-urlencoded" -d 'client_id=xxxxxx&scope=https%3A%2F%2Fmanagement.azure.com%2F.default&client_secret=xxxxxxx&grant_type=client_credentials' 'https://login.microsoftonline.com/xxxxxxxxxxxxxxxx/oauth2/v2.0/token') token=$(echo ${json} | jq -r '.access_token') curl --location --request PUT 'https://management.azure.com/…

update_all_jenkins_plugins_at_once

Anonymous (anonymous@undisclosed.example.com) — 2022-08-26T14:17:00+00:00

jenkins Update all Jenkins plugins at once First make sure you enabled the jenkins cli. In short go to JENKINS_URL/me/configure add the ssh public key and then expose the ssh server port in JENKINS_URL/configureSecurity/ If you are using the user called dev and you set a fixed port to 44556, execute this:

update_letsencrypt_mail_address_resubscribe

Anonymous (anonymous@undisclosed.example.com) — 2021-03-23T09:24:31+00:00

letsencrypt ssl Update Letsencrypt mail address or resubscribe certbot 0.23.0 To resubscribe just enter same email but add “+1” to your name sudo certbot register --update-registration --email you+1@youremail.com certbot 1.8.0 certbot update_account --email you@youremail.com

update_message_day_motd

Anonymous (anonymous@undisclosed.example.com) — 2021-11-11T08:40:46+00:00

bash Update message of the day (MOTD) Create new bash script under /etc/update-motd.d/. For example 99-footer file which will be executed after all other files in that directory: #! /bin/bash # Ansi color codes blue="\e[0;94m" reset="\e[0m" echo "=== Aliases set up: ===" # -e enables interpretation of escape sequences so that the colors work echo -e "${blue}dockip - get ip of container${reset}"

update_packages_debian_certificate_expired

Anonymous (anonymous@undisclosed.example.com) — 2021-12-14T15:23:14+00:00

ssl apt debian Update packages on Debian when certificate is expired If you see an error like this when trying to update the packages: ... Hit:10 https://download.docker.com/linux/debian buster InRelease Err:11 https://pkg.jenkins.io/debian-stable binary/ Release …

update_repos_debian_8

Anonymous (anonymous@undisclosed.example.com) — 2021-10-12T09:16:25+00:00

tag1 Update repos on Debian 8 Add old repos Make a backup of old sources cd /etc/apt/ cp sources.list sources.list.OLD and add only this line to the sources.list deb http://deb.debian.org/debian/ jessie contrib main non-free Update and install If you get an error like this when trying to update

upgrade_confluence

Anonymous (anonymous@undisclosed.example.com) — 2025-04-25T15:27:37+00:00

atlassian confluence Upgrade confluence 8.5.3 to 8.5.4 Also from: 8.5.4 -> 8.5.5, 9.0.1 -> 9.1.0 cd /root/ cp /var/lib/confluence/bin/setenv.sh /root/setenv.sh.bak_$(date +%F) && cp -r /var/lib/confluence/conf/ /root/confluence_conf_dir.bak_$(date +%F) wget https://product-downloads.atlassian.com/software/confluence/downloads/atlassian-confluence-8.5.4-x64.bin && chmod +x atlassian-confluence-8.5.4-x64.bin ./atlassian-confluence-8.5.4-x64.bin wget https://cdn.mysql.com//Downloads/Connecto…

upload_additional_file_types_wordpress

Anonymous (anonymous@undisclosed.example.com) — 2021-03-23T10:27:57+00:00

wordpress mime Upload additional file types in WordPress This fixes the error “Sorry, This File Type Is Not Permitted for Security Reasons”. In wp-config.php add this: define('ALLOW_UNFILTERED_UPLOADS', true); If you are not using some custome theme but a Wordpress builder of some kind, edit the

use_faster_php-fpm_instead_of_libapache2-mod-php

Anonymous (anonymous@undisclosed.example.com) — 2021-04-10T13:35:15+00:00

apache fpm php Use faster php-fpm instead of libapache2-mod-php Change php version to php7.3 for Buster. Install fpm and remove libapache apt install libapache2-mod-fcgid php7.0-fpm apt purge libapache2-mod-php7.0 Enable/disable modules a2dismod mpm_prefork a2enmod mpm_event actions fcgid proxy_fcgi alias setenvif ssl rewrite a2enconf php7.0-fpm systemctl restart apache2

use_hetzner_storage_box_docker_volume

Anonymous (anonymous@undisclosed.example.com) — 2023-06-19T13:02:45+00:00

docker cifs network_storage hetzner Use Hetzner storage box as docker volume First create the directory on the share e.g. dock_vol mkdir /mnt/backup/dock_vol Create volume with cifs driver docker volume create \ --driver local \ --opt type=cifs \ --opt device=//uxxxxxx.your-storagebox.de/backup/dock_vol \ --opt o=addr=uxxxxxx.your-storagebox.de,iocharset=utf8,rw,username=uxxxxxx,password=xxxxxxxxxx,file_mode=0660,dir_mode=0660 \ --name cifs_volume

use_jq_utility_pretty_format_json

Anonymous (anonymous@undisclosed.example.com) — 2023-07-20T09:38:15+00:00

json Use jq utility to pretty format json If you get an error like parse error: Invalid numeric literal at line 1, column 7 this is could be because the json contains single quotes instead of double quotes. This is invalid JSON: {'red': {'hue': {'dark': 2, 'white': 1}}, 'blue': {'blue': {'dark': 3, 'white': 3}, 'blue-2': {'dark': 3, 'white': 3}}}

use_konsole_profile_python_virtual_environment

Anonymous (anonymous@undisclosed.example.com) — 2021-05-15T09:19:39+00:00

kde konsole python virtualenv terminal Use Konsole profile in python virtual environment Create a file with the following contents. Let's call it RCFILE (use the name you want). source /etc/bash.bashrc source /home/USER/.bashrc source /path/to/env/bin/activate (Replace USER with your username of course.)

verdaccio_installation

Anonymous (anonymous@undisclosed.example.com) — 2021-07-23T13:27:17+00:00

npm nodejs javascript Verdaccio installation behind reverse proxy Create a private npm registry (repository). Pull from docker Bind mount method (for testing) Create folder structure and conf file mkdir verdaccio && cd verdaccio mkdir conf mkdir storage mkdir plugins

verdaccio_vanilla_install

Anonymous (anonymous@undisclosed.example.com) — 2021-07-23T13:20:46+00:00

verdaccio npm nodejs Verdaccio vanilla install Install node.js v12 curl -sL https://deb.nodesource.com/setup_12.x | sudo bash - apt install nodejs npm Install verdaccio npm install -g verdaccio Create systemd service cp /usr/lib/node_modules/verdaccio/systemd/verdaccio.service /lib/systemd/system/ && systemctl daemon-reload

vimspector_configs

Anonymous (anonymous@undisclosed.example.com) — 2023-08-24T09:32:50+00:00

vim plugins debug vimspector configs Below should be in .vimspector.json file in project directory or add it globally so you don't have to add it to every single project to /configurations///*.json e.g for python add it to $HOME/.vim/plugged/vimspector/configurations/linux/python/mydebug.json

virtualbox_allow_shared_folder_mounting

Anonymous (anonymous@undisclosed.example.com) — 2021-06-29T13:14:01+00:00

virtualization virtualbox Virtualbox allow shared folder mounting Add user to vboxsf group inside of VM sudo usermod -aG vboxsf userName Tested on * See also References

virtualbox_ssh_forwarding

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:39:59+00:00

ssh virtualbox Virtualbox ssh forwarding NAT network needs to be the first adapter in VM settings. List vms: VBoxManage list vms Create rule: VBoxManage modifyvm "Debian 9" --natpf1 "debian9ssh,tcp,,,," Show port forward: VBoxManage showvminfo "Debian 9" | grep Rule

virtualbox_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2026-01-20T12:34:21+00:00

virtualbox troubleshooting networking Virtualbox troubleshooting Problem with assigning static ip to vm Error: There was an error while executing `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. The command and stderr is shown below. Command: ["hostonlyif", "ipconfig", "vboxnet0", "--ip", "10.0.0.1", "--netmask", "255.255.255.0"] Stderr: VBoxManage: error: Code E_ACCESSDENIED (0x80070005) - Access denied (extended info not available) VBoxManage: error: Context: "EnableStati…

virtualbox_ubuntu_host_windows_guest_communication

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:41:50+00:00

virtualbox vm windows Virtualbox Ubuntu host and Windows guest communication 1. In VB enable Bridged Adapter (Settings>Network) 2. In Windows 7 enable firewall rule for ping File and Printer Sharing (Echo Request - ICMPv4-In) Tested on * Windows 7 See also References

vpn_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2024-06-06T12:38:45+00:00

vpn openvpn troubleshooting windows11 VPN troubleshooting OPTIONS ERROR: failed to negotiate cipher with server. Add the server's cipher ('AES-256-CBC') to --data-ciphers (currently 'AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305') if you want to connect to this server. Happens on Windows 11. In the client file change the line

welcome

Anonymous (anonymous@undisclosed.example.com) — 2020-07-29T09:35:28+00:00

Welcome to your new DokuWiki Congratulations, your wiki is now up and running. Here are a few more tips to get you started. Enjoy your work with DokuWiki, -- the developers Create your first pages Your wiki needs to have a start page. As long as it doesn't exist, this link will be red:

whois_lookup_list_ips_find_countries

Anonymous (anonymous@undisclosed.example.com) — 2022-04-25T09:41:27+00:00

whois dns ddos lookup ips whois lookup on list of IPs and find countries For a list of IPs in file like this: 115.73.43.82 171.226.37.107 116.100.13.224 171.252.244.192 27.75.96.60 115.73.181.107 27.64.204.111 116.177.225.197 27.65.174.108 115.72.36.7 ... do a lookup with

windows_2016_server_disable_password_expiry

Anonymous (anonymous@undisclosed.example.com) — 2022-11-12T11:44:36+00:00

windows Windows 2016 Server disable password expiry Right click on Start select Run, then type: lusrmgr.msc In window that shows select Users, then user (usually “Administrator” is the user), right click > Properties and tick Password never expires under General tab.

windows_installation_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2025-02-10T14:21:48+00:00

windows install troubleshooting Windows installation troubleshooting Load driver message If you encounter this message when trying to boot from a USB with Windows ISO it is most likely an issue with how the Windows ISO exists on USB drive. Also first check the BIOS. Newer laptops usually have some kind of software raid ON which Windows can't recognize, so you will need to switch this to AHCI mode and rerun the installation.

windows_local_user_account_missing_login_screen

Anonymous (anonymous@undisclosed.example.com) — 2021-06-02T07:39:35+00:00

windows ad active_directory Windows local user account missing on login screen Happens when you've set up a login for user with email e.g user@example.org which is joined on Windows domain (Azure AD). You need to enable the group policy 1. Click the start button and type

wireguard_mikrotik_setup

Anonymous (anonymous@undisclosed.example.com) — 2025-11-30T11:00:26+00:00

vpn wireguard mikrotik Wireguard mikrotik setup /interface/wireguard add name=wireguard1 /ip/address add address=192.168.100.0/24 interface=wireguard1 /ip/firewall/filter add chain=input action=accept protocol=udp dst-port=13231 If you have a different local subnet for your devices, like 192.168.200.0/24, you need to allow traffic from the wireguard subnet to it.

wordpress_nginx

Anonymous (anonymous@undisclosed.example.com) — 2022-08-16T10:28:55+00:00

wordpress nginx Wordpress on nginx Install packages apt install nginx php-fpm php7.0-mysql Config file example: upstream php { server unix:/var/run/php/php7.0-fpm.sock; } server { listen 80 ; listen [::]:80 ; server_name example.com; return 301 https://$host$request_uri; } server { # SSL configuration # listen 443 ssl ; listen [::]:443 ssl ; ssl on; ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_session_cache shared:SSL:10m; ssl_session_timeout…

wordpress_permissions

Anonymous (anonymous@undisclosed.example.com) — 2022-08-16T10:29:10+00:00

wordpress permissions Wordpress permissions Once the permission on WP files are tightened (see ) you might experience issues with updating the plugins and themes. To get around this the webserver user should be the owner of the wp-content folder and its content and have write access there. This is usually the user www-data.

wordpress_php_plugins

Anonymous (anonymous@undisclosed.example.com) — 2021-12-30T13:57:44+00:00

wordpress plugins php Wordpress php plugins Debian 10 apt install php7.3-cli php7.3-common php7.3-curl php7.3-fpm php7.3-gd php7.3-json php7.3-mbstring php7.3-mysql php7.3-opcache php7.3-readline php7.3-xml php7.3-zip php-imagick Debian 11 apt install php7.4-cli php7.4-common php7.4-curl php7.4-fpm php7.4-gd php7.4-json php7.4-mbstring php7.4-mysql php7.4-opcache php7.4-readline php7.4-xml php7.4-zip php-imagick

wordpress_sql_user_privileges

Anonymous (anonymous@undisclosed.example.com) — 2021-05-18T09:22:29+00:00

mysql mariadb wordpress sql Wordpress sql user privileges CREATE USER 'user'@'localhost' IDENTIFIED BY 'password'; GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER,INDEX,LOCK TABLES ON database_name.* TO 'user'@'localhost' IDENTIFIED BY 'password'; FLUSH PRIVILEGES; SHOW GRANTS FOR 'user'@'localhost';

wordpress_troubleshooting

Anonymous (anonymous@undisclosed.example.com) — 2023-04-21T11:05:09+00:00

wordpress troubleshooting Wordpress troubleshooting Too many redirects problem This happened after WP was installed without SSL and then after some days, SSL was added. It only happened when trying to access /wp-admin/ route. Adding the following lines of code at the after

wp_cli_commands

Anonymous (anonymous@undisclosed.example.com) — 2024-03-27T10:28:53+00:00

wordpress cli WP cli commands Standard WP cli commands Install wp cli first One liner: curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar &&\ chmod +x wp-cli.phar &&\ mv wp-cli.phar /usr/local/bin/wp &&\ wp --info --allow-root Below commands are executed by root user hence the flag

write_custom_host_path_docker_container

Anonymous (anonymous@undisclosed.example.com) — 2023-03-09T10:15:46+00:00

docker nginx proxy Write to custom host path from Docker container Say you have an app that generates some reports and its running in its own container. You want to serve the reports from this container via nginx on host machine. In your Dockerfile create reports dir and user/group, example of Dockerfile utilizing

yubikey_gpg_device_not_being_recognized

Anonymous (anonymous@undisclosed.example.com) — 2025-08-11T12:24:15+00:00

yubikey yubico gpg Yubikey gpg device not being recognized When you insert your yubikey and if you get an error like: ~$ gpg --card-status gpg: selecting card failed: No such device gpg: OpenPGP card not available: No such device