dr-robot

I use logcheck which should be available with your distro. It’s simple but pretty dumb though. It works by scanning your system logs, excludes any pre-configured regexps (it already comes with defaults for many of the most common logs), and sends you an email if there are any unexpected logs. I did have to add a bunch of custom regexps to exclude additional logs specific to my setup. But I just did this by adding new regexps whenever I got a logcheck email that I deemed irrelevant so not terribly difficult.

The end result is that I get an email with logs whenever anything unexpected happens. For example, I get emails whenever any SSH session is established (including my own) which gives me the confidence that if something starts going down, I should be able to see it.

Why not use KeepassXC? It’s a completely local encrypted db but it integrates with cloud storage apps like nextcloud for sync. It has plugins for integration with Firefox and KeepassAndroid is pretty smooth on the current Android OS.