When you log in, the cPanel & WHM version displays in the upper right-hand corner of the interface. You can also determine the version with the /usr/local/cpanel/cpanel -V command.
To see the latest available cPanel & WHM version in your chosen release tier, visit http://httpupdate.cpanel.net/ .
To update cPanel & WHM, use WHM’s Upgrade to Latest Version interface (Home >> cPanel >> Upgrade to Latest Version). To update cPanel & WHM from the command line as the root user, run the /scripts/upcp –force command.
To configure your server to automatically update to the latest version every morning, navigate to WHM’s Update Preferences interface (Home >> Server Configuration >> Update Preferences) and select Automatic in the Daily Updates section.