Help! Red hat doesn't recognize any usernames!

[Allen Chen]

Rajiv.baxi at netzero.net wrote:
> Are you able to boot to a Redhat CD?
> Sent from my Verizon Wireless BlackBerry
>
> -----Original Message-----
> From: "Anne Moore" <diabeticithink at yahoo.com>
> Date: Mon, 5 Oct 2009 16:49:05 
> To: 'General Red Hat Linux discussion list'<redhat-list at redhat.com>
> Subject: Help! Red hat doesn't recognize any usernames!
>
> Hi All,
>
> My server crashed. Now when I boot it up, just about all services/daemons
> that depend on any username, won't start because it doesn't recognize the
> username. I can also no longer logon as root or any other username because
> Red Hat doesn't recognize that the "user exists." 
>
> Does anyone have any ideas on how to troubleshoot or fix this very odd
> issue? My entire server is down because of it, which means 450 people can
> not logon to my network.
>
> I've fixed the file system, and now it has no errors. The Haldaemon won't
> start, nor the message bus, or atd, or many others.
>
> Thank you for your help!
>
> Anne
>
>   
which authentication do you use? local password or ldap server?
what version of Redhat?

Allen