Debian is an OS which uses the Linux kernel. Though it is usually installed on desktops, it is being used on a growing number of web servers as well. The reason is that it is really stable, so a server running it will not have to be restarted for months. Debian is also considered to be one of the most risk-free Operating Systems available, since security patches are released within days after an issue is discovered. This is possible because thousands of experienced developers are employed by the Debian project on a voluntary basis and not only do they work on the OS itself, in addition, they provide 24/7 support through special mailing lists and reply in twenty minutes to any kind of question. In this light, you will enjoy 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 among the Linux releases with the highest number of packages - more than 30,000. As the Operating System costs nothing to use, you will be able to modify both the core as well as all the packages in any way you see fit. Furthermore, you won't be required to pay any license fees.