Apache

[hacker_at_linux]

How to configure apache on ubuntu

[volkswagner]

How to configure apache on ubuntu

You should be more specific on your goal.

http://httpd.apache.org/docs/2.0/
https://help.ubuntu.com/8.04/serverguide/C/index.html

I would suggest starting with named based virtual hosts. Even If you only plan to use one site, adding one later will be a cake walk.

[Iowan]

Another (https://help.ubuntu.com/community/ApacheMySQLPHP) How-To I found helpful.