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Old 03-06-2008, 12:58 AM   #1
sandeeprana
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Registered: Mar 2008
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Post root password not accepting!!


I got RedHat linux ws 4 on many systems.

Suddenly systems have stopped accepting any user account...

neither root password is working even if it is true..

I try to reset root password in single mode...

Passwd changed successfully...

But It is not allowing to log in...

What should i do??? Any help???

[Gnome Desktop Envionment is only installed... not KDE]
 
Old 03-06-2008, 07:34 AM   #2
unSpawn
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Hello and welcome to LQ. Hope you like it here.

Quote:
Originally Posted by sandeeprana View Post
Suddenly systems have stopped accepting any user account...
neither root password is working even if it is true
Your first task is to find out the reasons why and when (that's two questions) the systems behaviour changed.
For that you'll have to find out (ask around if necessary):
- who manages the systems?
- who have access to (which parts of) the systems?
- what services do these systems provide?

Record system data just in case:
- processes (ps axfwwwe)
- network (netstat -na)
- open files (lsof -n)

The answers to the "who and what" questions guide you where look for changes in the system in case of anything not default.
Minimally you'll want to check:
- system login records (last, lastb, /var/log/secure),
- all system logs in /var/log,
- all daemon logs,
- any logs made by update tools,
- output of 'rpm -qVva',
- output of Chkrootkit, Rootkit Hunter, OSSEC, Aide, Samhain or even tripwire only if installed before the incident.

If there's cause for alarm do not neglect but do investigate previous (e-mail) correspondance with respect to reported errors by users and fellow admins, malfunctions and any hunches or gut feelings. If there's cause for alarm you also might want to use the Intruder Detection Checklist (CERT): http://www.cert.org/tech_tips/intrud...checklist.html as guidance.

If you report back please report *exact* errors, output or log lines, preferable in BB code tags.
 
  


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