Be careful with this. Don't remove old versions before ensuring the new package version works as expected.

How to list all the installed versions

LANG=C snap list --all | awk '/disabled/{print $1, $3}'

How to remove all the old versions in a batch

LANG=C snap list --all | awk '/disabled/{print $1, $3}' |
    while read SnapName revision; do
        sudo snap remove "$SnapName" --revision="$revision"
    done

This can save you some disk space, but it can become a headache if you don't make sure the new snap package version is working well. Also, don't forget to read the fine manual.

#Linux #Ubuntu #Snap #Tips