how to use Linode to host multiple web apps - RoR and PHP

view story

http://serverfault.com – I have a Ruby on Rails application and a couple of PHP projects nearly complete (all using MySQL) that I'd like to host on a Linode server and need some help with what I'd need to install and configure to do this. They would each have their own separate domain (probably with GoDaddy). I'm not looking for a step-by-step instructions - more of a guide of what I should look into and research to be able to do this myself. I'm not an expert at linux and this will be my first time using Linode and putting a Rails app into production so any advice is welcomed! Thanks (HowTos)