Debian is an Operating System which uses the Linux kernel. Though it is usually set up on desktop machines, it is being used on an increasing number of web servers too. The reason is that it's very stable, so a server running it won't need to be restarted for months. Debian is also regarded as being among the most secure Operating Systems to choose from, due to the fact that security patches are released within days after a problem is found. This is possible since thousands of well-experienced developers are part of the Debian project on a voluntary basis and not only do they work on the OS itself, but they also provide 24/7 support via special e-mail lists and respond within 20 minutes to any kind of question. In this light, you'll have an outstanding level of support directly from the developers who know their own platform in depth, and not from a third-party support team. Debian is also one of several Linux releases with the highest number of packages - more than 30,000. Since the Operating System is absolutely free to use, you're able to modify both the core and all the packages in any way you see fit. In addition, you will not have to pay any license fees.