How to solve long machine shutdown on Linux?

Question

linux

Elementary OS 0.4 Loki installed. When I turn off the computer and press ESC to monitor the shutdown process, I notice that it says: Stoping Network manager with online. Long worth it. You have to unplug your PC. But this does not always appear.

Answer 1

deal with a buggy service.
I periodically have recilio sync buggy when I turn it off, I can’t find time to see what it’s doing there,
and the shutdown timeout of the hung process is quite large, so it slows down.
look at the logs - understand.