Debian is a Linux distribution, that is preffered for desktop computers, but it's been gaining popularity as a server Operating System over the last couple of years as well. It's very dependable and secure, due to the fact that fixes are released within a few days after an issue is discovered. Debian has a huge support community, so if you have any questions or troubles with the OS or with any of the 30,000+ packages it includes, you are able to contact the developers without delay via e-mail using special mailing lists and receive a response within 15-20 min. The Debian community provides the top level of support possible, as all of your questions will be handled by the same people who created Debian in the first place, so they have an in-depth knowledge of how their own system operates. Because the Operating System is 100% free to use and distribute, no license costs will be included with your hosting fees and you'll be able to change the program code files and any other software that you install without restrictions, to optimize the software environment for your Internet sites. Furthermore, Debian performs really well on any kind of hardware, as it's light and quick and doesn't need much memory.