Debian is an Operating System which uses the Linux kernel. Though it is usually installed on desktop computers, 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 won't need to be restarted for months. Debian is also regarded as being one of the most safe Operating Systems available, as security patches are released within days after an issue is discovered. This is possible because thousands of well-trained developers are working for 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 mailing lists and reply in twenty minutes to any question. In this light, you will obtain top-notch 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 - over 30,000. Since the Operating System is completely free to use, you can modify both the core as well as all of the packages in the way you see fit. Also, you will not be required to pay any kind of license fees.