Tutorial: Ubuntu for Servers
"This is a detailed description about the steps to be taken to setup a Ubuntu based server (Ubuntu 5.0.4 - The Hoary Hedgehog) that offers all services needed by ISPs and hosters (web server (SSL-capable), mail server (with SMTP-AUTH and TLS), DNS server, FTP server, MySQL server, POP3/POP3s/IMAP/IMAPs, Quota, Firewall, etc.)."