I'm screwed - can't login
David G. Miller (aka DaveAtFraud)
dave at davenjudy.org
Fri Aug 5 03:41:18 UTC 2005
ndbecker2 at gmail.com wrote:
>My server has been running FC4 with all updates. After my son just
>accidentally unplugged it, it rebooted so that noone can login. If booted
>in text (mode 3), then after the login and password it just returns to
>login prompt.
>
>It can't be booted in single user mode. When this is tried, it says "going
>into single user mode", but then starts all the same services as mode 3
>(AFAICT) and acts just the same.
>
>I booted into rescue mode, did chroot /mnt/sysimage, and looked
>at /var/log/messages and /var/log/secure. Nothing intersting shown.
>
>I can't ssh in. It just logs in and out immediately.
>
>Perhaps related, I had selected to disable selinux IIRC and it said it would
>relabel on next boot. Of course, it crashed before that happened.
>
First question is, have you tried any other accounts when attempting to
ssh in? This could occur because your login shell has been set to
something like /bin/false or just something bogus.
Try booting in rescue mode (again) and take a look at /etc/passwd and
see what it looks like. It may have gotten zapped, /bin/bash may have
gotten zapped, etc. If /etc/passwd looks good, try changing your login
shell to something like /bin/tcsh or /bin/ksh and then reboot and try
logging in again.
Also, while in rescue mode, you might want to run fsck on which ever
partition holds /. If the functionality isn't there in rescue mode,
download and burn a knoppix live cd, boot from it and see what needs to
be cleaned up.
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