Debian is a Linux distribution, that's preffered for desktop machines, however it has been becoming more popular as a server OS during the last couple of years as well. It's very dependable and risk-free, due to the fact that fixes are released in just a few days after an issue is discovered. Debian has a large support community, so if you have any questions or troubles with the OS or with any of the 30,000+ packages it comes with, you will be able to contact the developers directly through electronic mail using special e-mail lists and receive a reply within 15-20 minutes. The Debian community supplies the best level of support possible, since your questions will be handled by the same people who built Debian in the first place, so they have a detailed knowledge of how their system operates. As the Operating System is 100% free to use and distribute, no license costs will be included with your hosting fees and you can customize the program code files and any additional software which you install without restrictions, so as to optimize the software environment for your websites. Furthermore, Debian performs really well on any kind of hardware, because it's light and fast and does not need much memory.