Virtual servers are a way for a single invocation of apache to serve multiple domain names. There are three ways to go about it, named based, port based, and address based. Port based is commonly used to serve HTTP and HTTPS from the same server. Address based virtual hosting is used primarily for backward compatibility to HTTP 1.0 clients, which don't transmit the desired hostname as part of the request. The most commonly used method of virtual hosting is named based, where multiple domain names share the same IP address (CNAME aliasing) and is commonly used by web hosting services to preserve IP space, and by SOHO's who wish to serve something like www.my_business.com and www.my_personal_page.net from the same server. One caveat is that named based virtual hosting cannot be used with SSL secure servers because of the way the SSL protocol works.

DirectoryPass is a Web site access control management system that allows users add and remove users from both .htaccess and .htpasswd files. It is compatiable with Cobalt RAQ .htaccess format, and can administer an unlimited number of .htaccess and .htpasswd files within a particular user's account or server. It features a Web interface only requires an administrator password to be set.

By Default apache2 package you will be given the package apache2-mpm-worker, other packages are available:

apache2-mpm-worker

The worker MPM provides a threaded implementation for Apache2. It is considerably faster than the traditional model, and is the recommended MPM.

apache2-mpm-prefork

This Multi-Processing Module (MPM) implements a non-threaded, pre-forking web server that handles requests in a manner similar to Apache 1.3. It is appropriate for sites that need to avoid threading for compatibility with non-thread-safe libraries.

Many FTP programs exist. This example covers the popular vsftpd (Red Hat default 9.0, Fedora Core, Suse) and wu-ftpd (Washington University) program which comes standard with RedHat (last shipped with RedHat 8.0 but can be installed on any Linux system). (RPM: wu-ftpd) There are other FTP programs including proFtpd (supports LDAP authentication, Apache like directives, full featured ftp server software), bftpd, pure-ftpd (free BSD and optional on Suse), etc ...

Mono provides the necessary software to develop and run .NET client and server applications on Linux, Solaris, Mac OS X, Windows, and Unix. Sponsored by Novell, the Mono open source project has an active and enthusiastic contributing community and is positioned to become the leading choice for development of Linux applications.