2
votes
1answer
81 views

How does `shutdown -k` disable logins?

This is the -k option's documentation in man shutdown (at least on Ubuntu): -k Only send out the warning messages and disable logins, do not actually bring the system down. I initially ...
14
votes
1answer
1k views

How to prevent shutdown when an SSH user is logged in?

I'm administrating a networked environment and I had an interesting situation arise yesterday. When a host is required to shutdown by a regular user, it refuses to do so if other users are logged in ...
2
votes
1answer
187 views

Why can I still log in via SSH (PAM Auth) while `shutdown -k` is active?

Pretty straight-forward. Does SSH ignore the nologin file created by shutdown -k TIME? Using PAM Auth to sync password database to users; if that makes a difference.