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.

• AlmaLinux 9

• http://www.datadisk.co.uk/html_docs/redhat/rh_lvm.htm