Problem in changing password

[mostafa]

Roopnarine, Peter wrote:
> -----Original Message-----
> From: fedora-list-bounces at redhat.com on behalf of mostafa
> Sent: Mon 10/8/2007 8:07 PM
> To: For users of Fedora
> Subject: Problem in changing password
>  
> Dear all,
>
> I have a problem in changing root's password form command line in Fedora 
> 7, it gives a message; (User not known to the underlying authentication 
> module).
>
> Thanks a lot
>
> Are you already logged in as root?!
>
>   
Yes, of course.