Debian is a Linux release, which is widespread for desktop computers, however it has been becoming more popular as a server Operating System during the last few years too. It's really dependable and safe, as fixes are released in just a few days after a problem is discovered. Debian has a huge support community, so if you have any kind of questions or troubles with the OS or with some of the 30,000+ packages it includes, you will be able to contact the developers right away via email using special mailing lists and receive a response in 15-20 min. The Debian community supplies the top level of support possible, as your questions will be handled by exactly the 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 absolutely 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 additional software that you install without restrictions, to optimize the software environment for your web sites. What's more, Debian performs very well on any hardware, because it is light and fast and doesn't need a lot of memory.