Apache is a free and open-source web server software used widely on both Linux and Windows operating systems. It supports many modules that add functionality like user authentication, URL manipulation, and virtual hosting. Apache's modular design allows new modules to extend its core functionality, and it is highly customizable through configuration files and modules.

1. Apache Web Server

2. What is Apache? Apache is a web server Apache is designed to be a powerful and flexible web server that supports a verity of platforms in a wide range of environments.

3. Why the name Apache? It is what it is. “ A Patchy Server” (1996-2001 Apache Server Project) Respect Well known endurance and warfare skills (2001-Present Apache Foundation)

4. Why use Apache Web Server? Free! Relatively quick and easy to install Supported on many platforms Unix, FreeBSD, Linux, Siolaris, Novell NetWare, Mac OS X, Microsoft Windows, OS2, TPF, and eComStation Widely Used Lots of Content Netcraft Stats Modular Design Allows for additions to the core of Apache

5. Examples of Modules Mod_auth Is used for basic HTTP authentication through use of plain text files Others: mod_auth_dbm, mod_auth_digest Mod _alias Manipulation and control of URLs RedrictMatch

6. Examples of Modules Continued Mod_rewrite Allows you to match URL patterns with regular expressions, and do a transparent redirect http://example.com/weblog/index.php?y=2000&m=11&d=23&id=5678 http://example.com/weblog/2000/11/23/example

7. Virtual Hosts Why might you want to use virtual hosts? One Domain with several sites Several Domains on a single server Testing Live Backups Savings

8. Final Thoughts You can make your own modules Do not reinvent the wheel Modules Use online documentation and forums Install and play with Apache and its modules Some modules can be complicated.

9. Useful Links Modules.apache.org http://modules.apache.org/ Httpd.apache.org http://httpd.apache.org/ ONLamp.com http://www.onlamp.com/

10. References Stephen, Wettone “How to use mod_rewrite to create clean URLs” Online. Available: http://wettone.com/code/clean-urls . 2008 Apache Foundation “Apache HTTP Server Project” Online. Available: http://httpd.apache.org/ . 2008 Netcraft “November 2008 Web Server Survey ” Online. Available: http://news.netcraft.com/archives/2008/11/19/november_2008_web_server_survey.html . 2008 Apache Foundation “modules.apache.org ” Online. Available: http://modules.apache.org/ . 2008 O’Reilly ”ONLamp Apache FAQ ” Online. Available: http://www.onlamp.com/ . 2008