redhat version

 cat /etc/redhat-release

Red Hat Enterprise Linux Server release 5.3 (Tikanga)

kernel. run on 64bit

 uname -a

Linux ctovm537 2.6.18-128.1.1.el5 #1 SMP Mon Jan 26 13:58:24 EST 2009 x86_64 x86_64 x86_64 GNU/Linux