Debian is an OS that uses the Linux kernel. Although it is usually installed on desktop machines, it's being used on more and more web servers too. The reason is that it's very stable, so a server running it will not need to be restarted for months. Debian is also regarded as being among the most risk-free Operating Systems out there, due to the fact that security patches are released within days after a problem is discovered. This is possible because thousands of skilled developers are employed by the Debian project on a voluntary basis and not only do they work on the OS itself, they also provide 24/7 support by using special mailing lists and respond within twenty minutes to any kind of question. In this light, you'll have top-notch support directly from the developers who know their own platform in detail, and not from a third-party support team. Debian is also among the Linux distributions with the highest number of packages - more than 30,000. Since the Operating System is absolutely free to use, you will be able to modify both the core as well as any of the packages in the way you see fit. Also, you won't need to pay any kind of license fees.
