Debian is a Linux release, that's widespread for desktop machines, yet it has been becoming more popular as a server OS over the last couple of years as well. It's really dependable and secure, because fixes are released in a few days after a problem is discovered. Debian has a large support community, so if you have any kind of questions or problems with the OS or with any of the 30,000+ packages it is equipped with, you will be able to contact the developers without delay via electronic mail using special mailing lists and receive a reply in 15-20 min. The Debian community provides the top level of support possible, as all of your questions will be handled by exactly the same people who created Debian in the first place, so they have a detailed knowledge of how their system operates. As the Operating System is absolutely free to use and distribute, no license charges will be added to your web hosting fees and you will be able to modify the code files and any other software that you install without any restrictions, to optimize the software environment for your Internet sites. What's more, Debian performs really well on any hardware, as it is light and fast and doesn't require much memory.