EasyApache is a web script in WHM which allows you to upgrade and manage the Apache web server; this notice is simply stating that the older EasyApache 3 is being phased out in favor of EasyApache 4; searching Google I found This post on Interserver about the differences in the two systems.

Please note that managing your hosting environment is out of the scope of the free user to user support on these forums, and we don't commonly provide input on managing ones web server short of the basic server requirements.

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
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