Debian is a Linux release, that's widely used for desktop computers, yet it has been becoming more popular as a server Operating System during the last few years too. It is very dependable and safe, because fixes are released in a couple of days after a problem is discovered. Debian has a large support community, so if you have any kind of questions or troubles with the OS or with any of the 30,000+ packages it includes, you're able to contact the developers straight away through email using special mailing lists and receive a response in just 15-20 minutes. The Debian community gives you the best level of support possible, since all of your questions will be handled by the same people that made Debian in the first place, so they have a detailed knowledge of how their system operates. Because the Operating System is absolutely free to use and distribute, no license costs will be added to your hosting fees and you'll be able to modify the code files and any other software which you install without restrictions, to optimize the software environment for your web sites. In addition, Debian performs very well on any kind of hardware, because it is light and quick and does not require a lot of memory.