For your question, you can check out https://www.vbulletin.com/docs/html/install
A bit of a newbie to the VPS (was on shared)
After reading this post by Lyne
Which is pretty far all i can really find on the matter...
Id like to know or be pointed in the right direction for the best enviroment for a VPS for a vB board
MySql version, PHP Version, CentOS version, PHP Compiled with (like Lynes post) etc etc etc