SettingUpNISHowTo - Authentication via NIS
Apache PHP MySQL - Setting up a LAMP (Linux Apache MySQL PHP) web server
Ruby on Rails - Setting up RoR (Ruby On Rails)
Apache Tomcat 5 - Java Servlet 2.4 engine with JSP 2.0 support
Blogging with WordPress - Blogging (web publishing).
Drupal - A robust content management system.
Joomla - Content Management System (CMS) that will help you build websites and other powerful online applications
Hive - How to set up a Digital Life Management System. Hive was formally known as Ubuntu Center.
Moodle with MySQL - Installing Moodle to run on MySQL
PhpBB2 - How to set up a PhpBB forum.
PunBB forum - PunBB is a fast and lightweight PHP-powered discussion board.
MoinMoin - a powerful and highly configurable wiki.
Mail, Groupware, and Chat Servers
Email - The starting point for mail servers - covers the different software used, how they relate together, and more. Read this first if you're unsure of anything.
Mailing List Server - Set up your own mailing list server with Mailman, as used on the Ubuntu mailing lists!
Groupware with Kolab - Setting up this complete mail and calendar server system.
Groupware with Hula - Setting up this modern mail and calendar server
Lotus Domino - Setting up Lotus Domino groupware server.
IrcServer - Set up an irc server.
SettingUpJabberServer - Set up a Jabber server.
MySQL 5.0 - Setting up a MySQL 5.0 server in Ubuntu
PostgreSQL quickstart - Setting up a PostgreSQL 8.1 server in Ubuntu
Installing Oracle 10g - Install Oracle 10g Enterprise Database in Hoary
Installing Firebird 1.5.x How to install and set Firebird server in ubuntu
Installing JDBC for MySQL 5.0 Install and setup of Java Database Connectivity for MySQL 5.0
Ingres 2006 - How to build, install and set up an Ingres 2006 server in ubuntu.
NFS Server - Setting up Ubuntu as an NFS server.
Samba Server - Setting up Ubuntu as an Samba server.
iFolderEnterpriseServer - Setting up an iFolder server.
Remote Administration Access
SSHHowto - Setting up SSH remote access.
SerialConsoleHowto - Setting up serial console access.
AjaxTerm - Ajax Terminal access.
PXEInstallServer - Set up a server to bootstrap installations.
Apt-Cacher-Server - Setup a local cache to speed up package installation.
IptablesHowTo - Set up a Firewall using iptables.
VPNServer - Setup and configure a VPN server.
DansGuardian - Setup an Internet Content Filter.
Folding@Home - Do some good with your idle CPU cycles.
Nagios2 - Installing and configuring Nagios2 for system and network monitoring.
Zenoss - Installing Zenoss network monitor on Ubuntu Server
Internet Traffic Monitoring - Monitor bandwidth usage on an Internet link.
Quasar - How to install Quasar Accounts, a fully featured client-server business accounting application.