This article applies to 123-reg VPS hosting running cPanel
This article will explain how you can change the host name of your 123-Reg VPS using cPanel.
Login to cPanel WHM interface.
Click on the Networking Setup link.
You can then click on the Change Hostname link.
Ensure that you follow the instructions given when entering you new Hostname, then click the Change button.
Your 123-Reg VPS Hostname will now change.