Debian is a Linux distribution, which is preffered for desktop machines, yet it's been gaining popularity as a server Operating System during the last few years as well. It is very dependable and risk-free, due to the fact that fixes are released in a few days after a problem is discovered. Debian has a vast support community, so when you have any kind of questions or issues with the OS or with some of the 30,000+ packages it features, you'll be able to contact the developers directly through email using special e-mail lists and receive a reply in 15-20 minutes. The Debian community offers the top level of support possible, because all of your questions will be handled by the very same people that 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 web hosting fees and you can modify the program code files and any other software which you install without restrictions, so as to optimize the software environment for your websites. Furthermore, Debian performs really well on any hardware, as it's light and fast and does not need much memory.