Debian is a Linux release, that is widespread for desktop machines, yet it's been gaining popularity as a server OS during the last couple of years as well. It is very stable and secure, as fixes are released in a couple of days after a problem is discovered. Debian has a large support community, so when you have any questions or issues with the OS or with any of the 30,000+ packages it features, you are able to contact the developers right away through email using special mailing lists and receive a response within 15-20 min. The Debian community supplies the best level of support possible, as all your questions will be handled by exactly the same people that created Debian in the first place, so they have a detailed knowledge of how their system works. As the Operating System is absolutely free to use and distribute, no license costs will be added to your web hosting fees and you will be able to customize the code files and any other software that you install without any restrictions, in order to optimize the software environment for your Internet sites. Furthermore, Debian performs very well on any hardware, as it is light and efficient and does not require much memory.