Debian is a Linux distribution, that's widely used for desktop machines, yet it's been gaining in popularity as a server OS during the last few years as well. It is really dependable and secure, 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 questions or problems with the OS or with some of the 30,000+ packages it is equipped with, you can easily contact the developers straight away via electronic mail using special e-mail lists and receive a response in 15-20 min. The Debian community supplies the top level of support possible, because all of your questions will be handled by the same people that created Debian in the first place, so they have a thorough knowledge of how their own system works. Because the Operating System is absolutely free to use and distribute, no license costs will be included with your web hosting fees and you'll be able to modify the code files and any additional software that you install with no restrictions, in order to optimize the software environment for your websites. What's more, Debian performs really well on any hardware, as it's light and effective and doesn't require a lot of memory.