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This tutorial will walk you through setting up DHCP failover on CentOS 5.1 using the default ISC dhcp server, this can easily be adapted to any other Linux distro out there. You will most likely need failover in environments where network down time can not be tolerated. My home is running a DLNA setup so I need my devices to be able to obtain network parameters at all times.

This tutorial shows how you can set up a Linux Mint 5 Elyssa R1 desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge. Linux Mint 5 is a Linux distribution based on Ubuntu 8.04 that has lots of packages in its repositories (like multimedia codecs, Adobe Flash, Adobe Reader, Skype, Google Earth, etc.) that are relatively hard to install on other distributions; it therefore provides a user-friendly desktop experience even for Linux newbies.

This guide explains how to set up mod_geoip with lighttpd on a Fedora 9 system. mod_geoip looks up the IP address of the client end user. This allows you to redirect or block users based on their country. You can also use this technology for your OpenX (formerly known as OpenAds or phpAdsNew) ad server to allow geo targeting.

This tutorial explains how to set up PHPIDS on a web server with Apache2 and PHP5. PHPIDS (PHP-Intrusion Detection System) is a simple to use, well structured, fast and state-of-the-art security layer for your PHP based web application. The IDS neither strips, sanitizes nor filters any malicious input, it simply recognizes when an attacker tries to break your site and reacts in exactly the way you want it to. Based on a set of approved and heavily tested filter rules any attack is given a numerical impact rating which makes it easy to decide what kind of action should follow the hacking attempt. This could range from simple logging to sending out an emergency mail to the development team, displaying a warning message for the attacker or even ending the user's session.

This tutorial shows how to install and use mod_python on a Debian Etch server with Apache2. mod_python is an Apache module that embeds the Python interpreter within the server. It allows you to write web-based applications in Python that will run many times faster than traditional CGI and will have access to advanced features such as ability to retain database connections and other data between hits and access to Apache internals.

There are tools available to allow anyone to create and distribute a completely customized Ubuntu Based distribution using the Gnome Desktop. Many Kubuntu users would like to do the same thing but such tools are not fully compatible with KDE and the Kiosk tool does not change or remove all of the Kubuntu defaults so that a program like Remastersys can create a customized ISO with the defined changes. This How To is designed to address these issues and allow those interested in creating their own customized distribution based on Kubuntu.

This guide explains how to set up WebDAV with MySQL authentication (using mod_auth_mysql) on Apache2 on a Debian Etch server. WebDAV stands for Web-based Distributed Authoring and Versioning and is a set of extensions to the HTTP protocol that allow users to directly edit files on the Apache server so that they do not need to be downloaded/uploaded via http://FTP. Of course, WebDAV can also be used to upload and download files.

I rely heavily on OpenVZ. In this article I would like to share some of my personal experiences in OpenVZ deployment. I assume that the readers already know how to install OpenVZ and the basics of OpenVZ. This article describes some tips on OpenVZ usage via the command line.

This tutorial shows how to configure a MySQL 5.1 cluster with five nodes: 1 x management, 2 x storage nodes and 2 x balancer nodes. This cluster is load-balanced by an Ultra Monkey package which provides heartbeat (for checking if the other node is still alive) and ldirectord (to split up the requests to the nodes of the MySQL cluster).

This document describes how to install the Internet Explorer (different versions) on Ubuntu 8.04 with IEs4Linux. Some users - especially web developers/designers need different versions of the Internet Explorer to test their pages.

This tutorial shows how to set up an Ubuntu Hardy Heron (Ubuntu 8.04 LTS) based server that offers DNS services using BIND. This article is written for the 32-bit version of Ubuntu 8.04 LTS, but should apply to the 64-bit version as well.

This document describes how to install and use gDesklets on Ubuntu 8.04. Taken from the gDesklets page: "gDesklets is a system for bringing mini programs (desklets), such as weather forecasts, news tickers, system information displays, or music player controls, onto your desktop, where they are sitting there in a symbiotic relationship of eye candy and usefulness. The possibilities are really endless and they are always there to serve you whenever you need them, just one key-press away. The system is not restricted to one desktop environment, but currently works on most of the modern Unix desktops (including GNOME, KDE, Xfce)."

This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.

If you are administrating a mail server and use blacklists to block spam, you probably know this problem: from time to time your customers complain that they cannot receive emails from certain freemailers. Most often this happens because a freemailer was abused to send out spam and therefore got blacklisted. This short guide shows how you can whitelist such a mail server in Postfix to make your customers happy again.

This guide explains how to set up mod_geoip with Apache2 on a Fedora 9 system. mod_geoip looks up the IP address of the client end user. This allows you to redirect or block users based on their country. You can also use this technology for your OpenX (formerly known as OpenAds or phpAdsNew) ad server to allow geo targeting.

This tutorial shows how you can set up an Ubuntu Studio 8.04 desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge.

This tutorial provides step-by-step instructions on how to install XEN on an Ubuntu Hardy Heron (8.04) Server System (amd64) without compromising on disk I/O and network throughput. You can find all the software used here in the Ubuntu repositories, so no external files or source compilation are required.

This document describes how to set up Songbird 0.5 on Ubuntu 8.04. Taken from the Songbird page: "Songbird is a desktop media player mashed-up with the Web. Songbird is committed to playing the music you want, from the sites you want, on the devices you want, challenging the conventions of discovery, purchase, consumption and organization of music on the Internet."

This tutorial provides step-by-step instructions on how to install VMware Server (version 1.0.6) on a Fedora 9 desktop system. With VMware Server you can create and run guest operating systems ("virtual machines") such as Linux, Windows, FreeBSD, etc. under a host operating system. This has the benefit that you can run multiple operating systems on the same hardware which saves a lot of money, and you can move virtual machines from one VMware Server to the next one (or to a system that has the VMware Player which is also free).

This guide explains how to set up WebDAV with Apache2 on a Debian Etch server. WebDAV stands for Web-based Distributed Authoring and Versioning and is a set of extensions to the HTTP protocol that allow users to directly edit files on the Apache server so that they do not need to be downloaded/uploaded via http://FTP. Of course, WebDAV can also be used to upload and download files.