Debian is a Linux distribution, that is widely used for desktop machines, yet it has been gaining in popularity as a server OS over the last couple of years as well. It's really stable and secure, due to the fact that fixes are released in just a couple of days after a problem is discovered. Debian has a huge support community, so if you have any questions or issues with the OS or with some of the 30,000+ packages it is equipped with, you're able to contact the developers without delay through electronic mail using special mailing lists and receive a reply in just 15-20 min. The Debian community provides the top level of support possible, because all of your questions will be handled by the same people who built Debian in the first place, so they have an exhaustive knowledge of how their system works. Because the Operating System is absolutely free to use and distribute, no license charges will be added to your website hosting fees and you will be able to change the code files and any additional software that you install without restrictions, to optimize the software environment for your Internet sites. What's more, Debian performs very well on any kind of hardware, because it's light and fast and does not require much memory.