You can find the CentOS version number (the major release version) by running the following command:
cat /etc/redhat-release
It should output a version number in a format like this:
CentOS release 6.4 (Final)
You can find the CentOS version number (the major release version) by running the following command:
cat /etc/redhat-release
It should output a version number in a format like this:
CentOS release 6.4 (Final)