Debian is an OS that uses the Linux kernel. Even though it is usually installed on personal computers, it's being used on a growing number of web servers as well. The reason is that it's very stable, so a server running it won't have to be restarted for months. Debian is also regarded as being one of the most risk-free Operating Systems to be found, due to the fact that security patches are released within days after an issue is found. This is possible since thousands of 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 mailing lists and respond in 20 minutes to any question. In this light, you will enjoy 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 among the Linux distributions with the highest number of packages - over 30,000. Since the Operating System is free to use, you will be able to modify both the core and any of the packages in any way you see fit. In addition, you will not have to pay any kind of license fees.