[CentOS] how to check the version of centos

Thu Apr 3 10:14:27 UTC 2008
Indunil Jayasooriya <indunil75 at gmail.com>

>  I had a server running centos 5 and have recently upgraded with centos 5.1
>  dvd
>  how do i check the version of my new installated OS

pls try below

cat /etc/redhat-release

Thank you
Indunil Jayasooriya