Removes older versions of Snap applications

remove-old-snaps.sh

#!/bin/bash
# Removes old revisions of snaps
# CLOSE ALL SNAPS BEFORE RUNNING THIS
echo "Current usage:";
du -h /var/lib/snapd/snaps
echo "";

set -eu
snap list --all | awk '/disabled/{print $1, $3}' |
    while read snapname revision; do
        snap remove "$snapname" --revision="$revision"
    done

echo "Usage after removing old versions:"
du -h /var/lib/snapd/snaps