On the NETTUTS.com website today Alex Villmann walks you through setting up a dedicated web server running Ubuntu, Apache, MySQL and PHP.
All great websites have a great server behind them. In this tutorial, I'll show you how to set up a dedicated web server (with Apache, MySQL, and PHP) using that old computer you have lying around the house and some free software.
The tutorial comes with plenty of screenshots for the Ubuntu install as well as the changes you'll need to make to the configuration files for the software to get things up and running. In the end you'll have a dedicated server you can drop anywhere and use to host your site.