Debian is a Linux release, that is widely used for desktop computers, however it has been gaining in popularity as a server OS over the last few years as well. It is really dependable and safe, as fixes are released within a couple of days after an issue is discovered. Debian has a huge support community, so if you have any kind of questions or issues with the OS or with any of the 30,000+ packages it is equipped with, you can easily contact the developers right away through electronic mail using special e-mail lists and receive a response within 15-20 min. The Debian community offers the best level of support possible, because all your questions will be handled by exactly the same people who built Debian in the first place, so they have an exhaustive knowledge of how their own system functions. Because the Operating System is absolutely free to use and distribute, no license costs will be added to your website hosting fees and you can change the code files and any other software which you install without any restrictions, to optimize the software environment for your sites. Furthermore, Debian performs very well on any hardware, as it's light and effective and doesn't need a lot of memory.