Check if backup/archive is actually created/deleted

[jmqm]

As of right now, even if a backup/archive couldn't be created/deleted, it'll still echo that it was successful. Would be nice if there is an actual check on it, if the operation was successful.

I don't want another check after creating/deleting a backup/archive. For example, I don't want to check how many to delete (archives x days old), delete them and then check again how many to delete. I don't know if that's possible in sh though.

I'll leave this for someone else to do, maybe I'll do it one day if no one has but as of right now, nope.