Debian is a Linux release, which is widely used for desktop computers, however it's been gaining in popularity as a server OS during the last couple of years as well. It's very stable and risk-free, since fixes are released in a few days after an issue is discovered. Debian has a large support community, so if you have any kind of questions or issues with the OS or with some of the 30,000+ packages it includes, you will be able to contact the developers straight away via electronic mail using special mailing lists and receive a reply within 15-20 minutes. The Debian community gives you the top level of support possible, since all your questions will be handled by the same people that created Debian in the first place, so they have an in-depth knowledge of how their system functions. As the Operating System is free to use and distribute, no license costs will be included with your hosting fees and you can customize the program code files and any additional software which you install with no restrictions, to optimize the software environment for your web sites. What's more, Debian performs really well on any kind of hardware, because it's light and quick and doesn't require much memory.