Unable to login as root - system freezes
I am attempting to login as root (using su - I'm pretty sure I blocked direct login as root). But when I enter my password, the system seems to "hang". Nothing happens. I can CTRL-c to exit su. But I can't login as root.
And this concerns me. Greatly.
I am very worried this is some kind of security issue.
Can anyone help?
(ps - my system is Debian Stable, old version. I've tried logging in as root over the virtual serial line - this is a virtual machine - but the same issue arises.)