To find out the kernel version or the release that we are currently running we can make use of the command "uname".
uname prints various system related information and to get the kernel version specifically we need to pass the options "-r".
If we pass the option "-a" the command gives the following inmformations
Kernel name,Node name on network,kernel release,kernel version,machine,processorand operating system.
Each of these can also be obtaned individually just like the kernel-release by passing the correct options, which are listed in the man pages.