I am working through this tutorial, but I am using a server that is out in a data center. So, I am not running the install using CDs or DVD. As a result, I'm not sure what various packages, etc. I should install so as to have the appropriate prerequisites (just what I need; nothing that's not needed). What should be done is hidden behind the menus. I would appreciate any guidance on how to get this preliminaries right. Thank you.