Linux XDMCP HOWTO
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# 1. Introduction

X Window System is the display and networking protocol developed by MIT. The X is built with network in mind with the capability to run a (graphical) session on a remote computer. In it, an X Display Manager is used to start a session from a local system or from another computer. The request and the start of the session is handled by the XDMCP, which stands for "X Display Manager Control Protocol" and is a network protocol. It provides a way of running the X-Terminal to run on your PC (or MAC) and it uses the X Server to provide a client/server interface between display hardware (the mouse, keyboard, and video displays) and the desktop environment while also providing both the windowing infrastructure and a standardized application interface (quoted from XFree86 Project home page). The X-Terminal can be displayed with an individual window or multiple windows, based on your X window system's software capabilities and setup.

I am always looking for the best way to use Linux, both at home and in work. One of the biggest advantages among all is the ability to re-use the older systems (like Pentium, Pentium II, Pentium III and even the 486 and AMD x86 CPUs) as a Xterminal (by using the Win32 apps; like Hummingbird's Exceed, Reflection X, X-Win32 or X-ThinPro. For MAC, try eXodus) to run from any of your PC remotely. I found out, somehow very surprising, that there are many documents on the INTERNET that can help you to set it up, but not with a step by step HOW-TO format! This is how I came up with this document as a way to share my experiences with all users. By using X and XDMCP, you can build a good, reliable and low cost X- environment for your home or work IT solution. Best of all, it is free! You will also find out that those long abandoned PC by the current Windows system can run the X in Linux just fine! It can save you money and spare the mother earth!

In recent years, new Linux distributions are getting easier to use by adding new user UI. However, I still believe much in manual control of the system and application if I can, because in this way, I know what I am going to change in my system in the way I wanted it. Therefore, I will focus this document on manual configuration.

## 1.1. Disclaimer

No liability for the contents of this documents can be accepted. Use the concepts, examples and other content at your own risk. As this is a new edition of this document, there may be errors and inaccuracies, that may of course be damaging to your system. Proceed with caution, and although this is highly unlikely, the author(s) do not take any responsibility for that.

All copyrights are held by their by their respective owners, unless specifically noted otherwise. Use of a term in this document should not be regarded as affecting the validity of any trademark or service mark.

Naming of particular products or brands should not be seen as endorsements.

You are strongly recommended to take a backup of your system before major installation and backups at regular intervals.

## 1.2. Feedback

Feedback is most certainly welcome for this document. Without your submissions and input, this document wouldn't exist. Please send your additions, comments and criticisms to the following email address : `<tomchao@alcatel-lucent.com>`.

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