Debian is a preferred Linux distribution, that is used mainly on desktop machines, but many people have started using it lately as a web server OS too, due to the stability and protection it provides. The latter is a result of the fact that Debian is developed and supported by a large number of qualified volunteers internationally, so that any patch which is necessary to fix some issue is released within a couple of days. The very same community can also help you with any question or trouble that a user may ever encounter, as they can be contacted through electronic mail using e-mail lists and a competent response will be sent in around 15-20 minutes. The advantage here is that all your queries 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 provided for free, you will not need to pay any kind of license fees to use it and you will be able to personalize it as much as you want or need. This is valid for both the Operating System as well as the 30.000+ software packages which are available for it.