The easiest way to check your CentOS version is via the command line.
Login to your CentOS server using SSH and run the following command:
You may also use:
This should return the following CentOS version information:
CentOS release 6.2 (Final)
entOS version history follows that of Red Hat but it could be delayed, which is just one of a few things you should know before running a CentOS server.