Debian is a well-known Linux release, that's used mainly on desktop computers, still numerous people have started using it lately as a web server Operating System too, because of the stability and protection it supplies. The latter is a consequence of the fact that Debian is developed and supported by a large number of qualified volunteers internationally, 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 trouble that a user may ever encounter, due to the fact that they can be contacted through electronic mail using e-mail lists and a competent response will be sent in around 15-20 min. The advantage here is that all your queries will be responded to 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'll be able to personalize 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.