Ubuntu error messages, what are your first steps?

Question

ubuntu

Hey!
I'm using xubuntu 14.04, after downloading an error message appears, the question is what should I do (what logs to look at) in order to understand what the problem is?

Answer 1

Can you at least see a screenshot of the error?
Well, if you pretend to be a telepath, then for a start you can look at 'dmesg' (although it is not known what error)

Answer 2

Type dmesg in the terminal if there is nothing there, see less /var/log/syslog and other logs, what is the error. There are no telepaths.

Answer 3

If the error is not critical, then work on. Closed the messages and everything.