[CentOS] Cannot See Login Screen Anymore !!

Fri Jun 22 13:47:41 UTC 2012
Shiv. Nath <prabhpal at digital-infotech.net>

Hi CentOS community Friends,

It is CentOS 6.2 x86_64 machine, i have upgraded few packages using "yum 
-y update", after the reboot machine does not show login screen, i have 
allowed enough time to show the screen that are about 2 hours. booting 
process does complete, it just hangs when it is about to show the 
screen. i tried to check by doing ssh for warring/error logs. nothing 
serious was there. but when i did the ssh to the server then i saw the 
following error. Prior to the upgrade machine was just okay.. )

MacBook-Pro:~ prabhpal$ ssh -l mike 41.211.25.233
mailer at 41.211.25.233's password:
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied

Thanks / Nath