Debian is a preferred Linux release, that's used primarily on PC's, but numerous people have begun using it lately as a web server OS as well, because of the stability and security it supplies. The latter is a direct result the fact that Debian is developed and supported by thousands of qualified volunteers all around the world, so that any patch which is needed to fix some issue is released within a few days. The same community will also help you with any question or issue that a user may ever have, due to the fact that they can be contacted through e-mail using e-mail lists and a competent response will be sent in around 15-20 min. The advantage here is that your questions will be replied by the same people who have created the Operating System itself and they have a detailed knowledge of how it functions. As Debian is absolutely free, you will not need to pay any license fees to use it and you can personalize it as much as you want or need. This is valid for the Operating System as well as the 30.000+ software packages that are available for it.