Debian is an Operating System which uses the Linux kernel. Though it is usually set up on personal computers, it's being used on an increasing number of web servers as well. The reason is that it's very stable, so a server running it will not need to be restarted for months. Debian is also considered to be one of the most safe Operating Systems to choose from, because security patches are released within days after an issue is discovered. This is possible since 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, but they also provide 24/7 support through special e-mail lists and respond in twenty minutes to any kind of question. In this light, you will receive an outstanding level of support directly from the developers who know their own platform in detail, and not from a third-party support team. Debian is also one of the Linux distributions with the highest number of packages - over 30,000. Since the Operating System is completely free to use, you'll be able to modify both the core as well as all the packages in any way you see fit. Furthermore, you will not have to pay any kind of license fees.