Debian is a Linux release, which is widespread for desktop computers, however it has been gaining in popularity as a server Operating System over the last few years too. It is very stable and secure, as fixes are released in just a couple of days after an issue is discovered. Debian has a large support community, so when you have any kind of questions or troubles with the OS or with any of the 30,000+ packages it features, you'll be able to contact the developers directly through email using special e-mail lists and receive a response within 15-20 minutes. The Debian community gives you the best level of support possible, since all your questions will be handled by the same people who created Debian in the first place, so they have a thorough knowledge of how their system works. Since the Operating System is free to use and distribute, no license charges will be included with your website hosting fees and you will be able to change the program code files and any additional software which you install without restrictions, to optimize the software environment for your Internet sites. Furthermore, Debian performs really well on any kind of hardware, because it's light and fast and does not need a lot of memory.