Debian is a preferred Linux release, which is used primarily on desktop machines, but numerous people have started using it lately as a web server Operating System too, due to the stability and protection it provides. The latter is a result of the fact that Debian is developed and supported by countless qualified volunteers around the globe, therefore any patch which is necessary to fix a certain issue is released in a matter of days. The very same community can also help with any question or problem that a user may ever have, due to the fact that they can be contacted via e-mail using e-mail lists and a competent response will be sent in around 15-20 minutes. The advantage here is that your questions will be answered by the same people who have made the Operating System itself and they have an in-depth knowledge of how it works. As Debian is free, you will not have to pay any kind of license fees to use it and you'll be able to customize it as much as you want or need. This is valid for both the Operating System and the 30.000+ software packages that are readily available for it.