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Unable to Enter Red Hat 9.0 System via root or any user both thru grub or text based terminal after attempting to Configure FTP server on instructions thru internet on second Computer?

Posted on 2004-09-07
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Last Modified: 2013-12-15
Dear Sir/Madam

My RedHat Linux 9.0 Server is booting properly, The login Page also appears. But When I enter User and Passwd nothing happens except flashing of Login screen (Main Screen with session, language, reboot and shutdown Buttons at bottom) but the login prompt reappears (No Errors Whatsoever). Same goes when I attempt to login in text mode i.e Terminal window (Ctrl+Alt+F1 or F2 ...etc).

This happened after I rebooted system on finishing configuring FTP Server via help thru internet on another computer. I was trying to configure FTP on my Linux Server and made some changes to /etc/ftpusers, /etc/hosts.allow , /etc/hosts.deny, /etc/ftpaccess configuration files etc.
But next day when rebooted the machine I am not able to login either as root or normal user and No Error Message Appears whatsoever.

I have tried booting thru Installation CD-1 , linux rescue, Shell prompt, Undid all changes made in a/m files like /etc/ftpusers , removed passwd from /etc/shadow. Even changed Passwd of root at root prompt Using #passwd root . Rebooted the System without CD-1 now but same problem persists.

I was even successful logging as super user in Single User mode without Redhat CD-1 using e and b commands for editing grub and booting. Checked up that all configuration files touched by me thru .bash_history , Brought them to orignal stage , changed root passwd also . But all this was of no avail.

Request Guide to get rid of this Problem Please as I am able to login as a single user thru backdoor entry but not thru main door. The fact that I am able to see my website on Client Computer which is hosted on This very Server is indicative of System is in Perfect Sync but only the Authentication Problem after Booting is giving nightmare to me. Request Urgent Assistance please.

Thanks
Rakesh
rakesh@irfc-nausena.org
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Question by:roks1957
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Expert Comment

by:jlevie
ID: 11999321
Could I see what the line /etc/passwd for root's account looks like?

Can you login as an ordinary user on a text console and 'su' to root? If that works what happens if you 'su -' from an ordinary user account?
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Author Comment

by:roks1957
ID: 12003421
Thanks for prompt reply, However, I could solve this problem thru authconfig command and it  took me 8 hrs of continuous reading of RedHat Linux Bible for me to get back into my system. I had checked in MD5 as well as Kerberos method of Authentication along with Shadow thing. I checked the /etc/shadow authentication and unchecked the MD5 and Kerberos while running authconfig in Single User mode.

I herby close this question.

Rakesh
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Expert Comment

by:jlevie
ID: 12003761
Kerberos was your problem. MD5 was okay and is the preferred method of encrypting passwords.
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