Debian is a Linux release, that is widely used for desktop computers, but it has been becoming more popular as a server OS during the last couple of years too. It's very dependable and safe, because fixes are released within a few days after an issue is discovered. Debian has a vast support community, so if you have any questions or issues with the OS or with some of the 30,000+ packages it features, you are able to contact the developers immediately via e-mail using special mailing lists and receive a reply in just 15-20 minutes. The Debian community supplies the top level of support possible, because all your questions will be handled by exactly the same people who made Debian in the first place, so they have an in-depth knowledge of how their system works. As the Operating System is free to use and distribute, no license charges will be added to your hosting fees and you'll be able to customize the program code files and any other software which you install without any restrictions, to optimize the software environment for your web sites. In addition, Debian performs really well on any hardware, as it's light and efficient and does not need a lot of memory.