With a share of more than 70%, the Apache HTTP Server (Apache) is the world's most widely-used Web server according to the Survey from http://www.netcraft.com/. Apache, developed by the Apache Software Foundation (http://www.apache.org/), is available for most operating systems. openSUSE® includes Apache version 2.2. In this chapter, learn how to install, configure and set up a Web server; how to use SSL, CGI, and additional modules; and how to troubleshoot Apache.