You could boot from a rescue CD, mount the filesystem, and then look around for 
issues, including pam and the passwd file.  You might want to run a rootkit 
finder as well.

Jeremy

On Wednesday 04 February 2009 3:42:05 pm Raymond Norton wrote:
> I am trying to help another tech fix a login problem. Users cannot login
> to the console or via ssh. When an attempt is made all users get
> "permission denied".
>
>  However users, including root can login via webmin. Attempting to
> change root password returns the following error:
>  passwd: Authentication information cannot be recovered
>
> Googling around seems to indicate it might be a problem with pam, but I
> have not found a solid answer on how to fix it yet.
>
>
>
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