Debian is a Linux release, which is widely used for desktop computers, yet it's been gaining in popularity as a server OS during the last couple of years too. It's really stable and secure, because fixes are released in a couple of days after a problem is discovered. Debian has a huge support community, so when you have any questions or issues with the OS or with any of the 30,000+ packages it is equipped with, you can contact the developers right away via electronic mail using special e-mail lists and receive a response within 15-20 min. The Debian community provides the best level of support possible, because all your questions will be handled by the very same people that built Debian in the first place, so they have a thorough knowledge of how their own system operates. Because the Operating System is free to use and distribute, no license costs will be added to your website hosting fees and you will be able to modify the program code files and any additional software that you install with no restrictions, so as to optimize the software environment for your websites. What's more, Debian performs very well on any kind of hardware, as it's light and effective and doesn't require a lot of memory.