Updated to cover the changes in Apache's latest release, 2.0, as well as Apache 1.3, this guide discusses how to obtain, set up, secure, modify, and troubleshoot the Apache software on both Unix, Perl and Tomcat, the book examines PHP, Cocoon, and other new technologies that are associated with the Apache Web server. Apache is a widely used Web server platform which runs more than half of the world's existing web sites. In this third edition of "Apache: The Definitive Guide", Web administrators new to Apache will come up to speed quickly, and experienced administrators will find the logically organized, concise reference sections indispensable, and system programmers interested in customizing their servers will rely on the chapters on the API and Apache modules.