How To Find Out RHEL 6 / CentOS 6 Kernel Version

You can find the kernel version of a Red Hat Enterprise Linux 6 (RHEL 6) or CentOS 6 system by using the uname command with the -r option. The -r option displays the kernel release number. Here’s an example:

This will output the kernel version number, for example:

In this example, 2.6.32-754.18.2.el6.x86_64 is the kernel version number. The el6 in the version number indicates that this is a Red Hat Enterprise Linux 6 (RHEL 6) or CentOS 6 system.