Sorry for not writing very clearly. here are the details: $ kernel -qa|grep kernel kernel-PAE-2.6.18-53.el5 $ uname -a Linux localhost.localdomain 2.6.18-53.el5PAE #1 SMP Mon Nov 12 02:55:09 EST 2007 i686 i686 i386 GNU/Linux $ rpm -q centos-release centos-release-5-1.0.el5.centos.1 Also, I checked that if I reboot the system without any external attachment (i.e. no mouse, no keyboard, no monitor) and attach these elements later, none of these are recognized. What I want is just a network connected CPU to run the program. That's all. I can control the program running on it using ssh from another machine. I would like to add one more thing is this: when I log into a gui-session (gnome), and run my program on a terminal there, it lasts for 1-2 days before suspension. However, if I log into console-mode (no gui), it lasts only for 4-5 hours before suspension. I again think it is entirely a kernel problem. Would recompiling the kernel with some specific options help? Thanks for allocating your time!! _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos