Debian is a Linux release, which is preffered for desktop machines, but it has been becoming more popular as a server Operating System during the last couple of years as well. It's really stable and secure, due to the fact that fixes are released in a couple of days after a problem is discovered. Debian has a huge support community, so when you have any kind of questions or troubles with the OS or with some of the 30,000+ packages it comes with, you'll be able to contact the developers right away via electronic mail using special e-mail lists and receive a reply in just 15-20 min. The Debian community supplies the best level of support possible, because your questions will be handled by exactly the same people that made Debian in the first place, so they have an in-depth knowledge of how their own system functions. Since the Operating System is free to use and distribute, no license charges will be added to your hosting fees and you will be able to change the code files and any additional software that you install without restrictions, in order to optimize the software environment for your Internet sites. In addition, Debian performs really well on any kind of hardware, as it's light and efficient and does not need a lot of memory.