Find OEL Version

I always had hard time to find the Oracle Enterprise Linux Version. Below are some options to view system information and OS Version on Linux System

1. # uname -a
   Shows the System Information (64 bit or 32 bit)
   Linux WCDEV 2.6.32-100.26.2.el5 #1 SMP Tue Jan 18 20:11:49 EST 2011 x86_64 x86_64 x86_64 GNU/Linux

2. # more /etc/redhat-release

   This shows the Version of OS as below

   Red Hat Enterprise Linux Server release 5.6 (Tikanga)

3. # dmidecode | more

   This shows the hardware information

4. # cat /proc/meminfo

   This shows the memory information. Another command to check the memory is

   # free