How do I make sure that my server is running the latest version of cPanel/WHM ?
You can find out what version of cPanel/WHM you are using by logging into WHM (WebHost Manager). The version will be displayed in the upper right-hand corner. You can also find out the version by running /usr/local/cpanel/cpanel -V from the command prompt. To see what the latest available cPanel version is in your chosen tree (STABLE/RELEASE/CURRENT/EDGE), please visit http://layer2.cpanel.net.
If you wish to update cPanel through WHM, under the cPanel category, select Upgrade to Latest Version. If you wish to update cPanel from the command prompt as root, run /scripts/upcp --force.
If you would like your server to automatically update to the latest version every morning, in WHM go under Server Configuration >> Update Config and make sure you have Automatic dotted in for the tree you are using.