Yep, It’s very simple to find out your WHM/cPanel version from command-line. Do follow the steps pasted here:
Step 1 : Login to your server as root.
Step 2 : Run
# /usr/local/cpanel/cpanel -V
# cat /usr/local/cpanel/version
[root@server]# /usr/local/cpanel/cpanel -V 11.40.1 (build 11)
Form the graphical side, the version is listed on the top of WHM control panel, see the image below:
That’s it 🙂