Dear All, I'm running linux CentOS 4.4. Everything was working fine, then one day I tried to log in, and my computer "hung" Upon reboot I got this error message after the GRUB Bootloader screen: /etc/rc.d/rc.sysinit: line 126: 442 Segmentation fault /bin/dmesg -n $LOGLEVEL Initialization hardware... /etc/rc.d/rc.sysinit: line 167: 450 Segmentation fault LC_ALL=C fgrep -xq "$1" /etc/hotplug/blacklist >/dev/null /etc/rc.d/rc.sysinit: line 167: 455 Segmentation fault LC_ALL=C fgrep -xq "$1" /etc/hotplug/blacklist 2>/dev/null ................. Out of Memory: Killed process 722(sh). Out of Memory: Killed process 1133(sh). Out of Memory: Killed process 1151(sh). .................. 07/21 17:32:20 checklock: stat failed, no file 07/21 17:32:20 locking the line 07/21 17:32:20 makelock(ttys1) called 07/21 17:32:20 checklock: stat failed, no file 07/21 17:32:20 cannot open /proc/0/cmdline: No such file or directory .................. After i have rebooted the PC once again and I have getting same problem continuously. After booted up the server, login showing as "(none) login:". The following error are display on screen while execute the commands:- -bash-3.00$ ifconfig Warning: cannot open /proc/net/dev (No such file or directory). Limited output. -bash-3.00$ ls ls:error while loading shared libraries: Ej: cannot open shared object file: No such file or directory. -bash-3.00$ ll -bash: ll: command not found We are not sure why this is happening. Can some one throw light on this. Regards -S.Balaji