PAM breakage

[David Gurvich]

I have been having a similar problem.  I can no longer login as root, getting 
a pam error.  However, I can boot into single-user mode, modify a normal user 
to allow that user to su root.  Then I can login using root & root password.  
I cannot login as root at all otherwise.  Likewise SSH is disabled for 
everyone. 

I don't believe that disabling root login is bad.  I still haven't figured out 
how to enable ssh.