Binary package “lubuntu-update-notifier” in ubuntu lunar

Qt notifier for available upgrades, has a very simple upgrader

 Package includes a bash daemon ( which
 checks if there are updates available. If there are it opens which
 is a window that notifies about package updates available. If you decide to
 upgrade a full upgrade (not safe-upgrade) with the upgrader binary will take
 Upgrader can also be run alone, it can be chosen to run cache update before and
 if a safe or full upgrade will be done. There is also a .desktop to call
 upgrader with cache update and a full upgrade.