Debian is an OS that uses the Linux kernel. Even though it is usually installed on desktop machines, it's being used on a growing number of web servers too. The reason is that it's really stable, so a server running it will not have to be restarted for months. Debian is also considered to be among the most protected Operating Systems to choose from, since security patches are released within days after an issue is discovered. This is possible because thousands of qualified developers are part of the Debian project on a voluntary basis and not only do they work on the OS itself, in addition, they provide 24/7 support by using special e-mail lists and respond within twenty minutes to any question. In this light, you will obtain top-level 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 - over 30,000. Since the Operating System is absolutely free to use, you are able to modify both the core and all of the packages in the way you see fit. In addition, you will not be required to pay any license fees.