LINUX Version Info
To learn the architecture and kernel version info use the shell command below:
less /etc/redhat-release
The output will be like
CentOS release 5.6 (Final)
To learn the architecture & kernel version:
uname -a
you can use the command above, the last numbers marked as red below is your architecture:
Linux xxx.veriportal.com 2.6.18-164.9.1.el5 #1 SMP Tue Dec 15 20:57:57 EST 2009 x86_64 x86_64 x86_64 GNU/Linux