This message is shown sometimes after booting:
This obviously leads me to believe that there is an update available somewhere, but clicking on it does nothing, and I can't find any updates in the Software Updater either. It would at least help if it let me know how to install them.
How/where do I install these updates, and if this is a bug, how do I fix it?
sudo apt dist-upgrade
it should pull any updates and get rid of the message. – Mark Kirby Jun 01 '16 at 13:44