The LAMP server (Linux, Apache, MySQL, PHP (or Perl) is one of the most important servers you might ever set up. It will happily serve up dynamic, database-driven web sites without needing constant babysitting. Since the LAMP server's underlying foundation is Linux it enjoys rock-solid reliability, security, and can be installed on all kinds of hardware (from that old white-box you have to a multi-CPU, RAID-enabled rack server).

More information at: Linux.com