I think I'm never notified of updates (with a systray icon) unless I manually do apt-get update. Is that normal? How can I make it check automatically?
In software-properties-kde I have "Check for updates: Daily"; "Install security updates without confirmation". So maybe it has been installing security updates all along, ones that don't require a restart, and I haven't know about it. But the several times (over a few months) that I've manually "refreshed", the "Install security updates without confirmation" thing didn't apply, probably because it applies only when the auto-updater finds updates. So, considering my settings, am I safe (i.e. can I trust that my settings will install security updates automatically)?
Related question: "How can I check if automatic updates are enabled?" (but that question is about automatic update installing while I just want automatic update checking.