Listing installed packages except base on arch Posted on 2013-06-23 by jimmy Mostly a reminder for myself, this was borrowed from https://wiki.archlinux.org/index.php/Pacman_Tips#Removing_everything_but_base_group comm -23 <(pacman -Qeq|sort) <((for i in $(pacman -Qqg base); do pactree -ul $i; done)|sort -u|cut -d ' ' -f 1)