Debian is a Linux release, that's widespread for desktop machines, but it has been gaining popularity as a server Operating System over the last couple of years as well. It is really dependable and protected, because fixes are released in a few days after an issue is discovered. Debian has a huge support community, so when you have any questions or troubles with the OS or with any of the 30,000+ packages it is equipped with, you can contact the developers immediately via e-mail using special mailing lists and receive a reply in 15-20 minutes. The Debian community offers the best level of support possible, because 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 own system functions. Since the Operating System is free to use and distribute, no license charges will be included with your web hosting fees and you can customize the program code files and any additional software which you install with no restrictions, so as to optimize the software environment for your websites. What's more, Debian performs really well on any kind of hardware, because it is light and effective and does not need a lot of memory.