How to Upgrade WHM / cPanel Linux server to EDGE release

Follow the steps below,

a] Just login to WHM

b] Look for Server Configuration

c] Click on Update Config

d] Set cPanel/WHM Updates option to Manual Updates Only (bleeding EDGE tree)

http://www.cyberciti.biz/faq/wp-content/uploads/2007/07/whm-cpanel-edge-upgrade.jpg

e] Click on Save.

To start upgrade procedure

Look for cPanel

Click on Upgrade to Latest Version

Click on Click Upgrade button
Edge upgrade from a shell or command prompt

Login as the root via ssh. Edit /etc/cpupdate.conf file:
# vi /etc/cpupdate.conf
Find line
CPANEL=stable
Replace with:
CPANEL=manual-edge
Save and close the file. Now update to edge:
# /scripts/upcp --force