Debian is a well-known Linux release, that's used mainly on PC's, but numerous people have begun using it lately as a web server Operating System as well, because of the stability and protection it provides. The latter is a direct result the fact that Debian is developed and supported by numerous qualified volunteers all around the world, so that any patch which is needed to fix a particular issue is released within a few days. The very same community can also help with any question or trouble which a user may ever experience, as they can be contacted through electronic mail using e-mail lists and a competent response will be sent in no more than 15-20 min. 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 absolutely free, you won't need to pay any kind of license fees to use it and you will be able to customize it as much as you want or need. This is valid for the Operating System and the 30.000+ software packages that are readily available for it.