User Tools

Site Tools


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

Comment and uncomment lines containing specific strings

sed -e '/multiverse/s/^/#/' -i /etc/apt/sources.list
sed -e '/multiverse/s/^#//' -i /etc/apt/sources.list

Search and replace strings in multiple html files:

for file in $(grep -cr --include "*.html" "somestring" . | awk -F ":" '{print $1}');do sed -i 's/\bsomestring\b/newstring/g' $file;done

\b is word boundary, meaning it won't select strings like string_somestring_smth_smth Put sed -n… and ..newstring/gp' to just see the changes without actually making them.

zcat server_20170726-060002.log.gz | awk '/2017-07-25\ 20:54:59.381/,/2017-07-25\ 21:16:00.948/' - > incident.txt

Sed add word/string after specific string on same line i.e. add "blablah" after " localhost ":

sed 's/\blocalhost\b/& blablah/' file
 du -s /var/lib/mysql/mydb/{table1,table2,table3}.* | awk '{ sum+=$1} END {printf sum/1024^2; print " GB"}'

Tested on

See also


wiki/bash_commands.txt · Last modified: 2022/11/12 12:37 by antisa

Except where otherwise noted, content on this wiki is licensed under the following license: CC0 1.0 Universal
CC0 1.0 Universal Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki