Ubuntu is a very popular OS, that employs the Linux kernel. Even though it is used mainly on desktops, its server version has been gaining in popularity recently as well. Ubuntu is among the lightest Linux releases available and it's compatible with almost any kind of hardware, that makes it a universal Operating System. It is also very stable and secure and has an a minimum of a 5-year support life cycle, so you are able to get official security and performance updates. Unlike many other Operating Systems, Ubuntu is distributed without license fees and you are able to modify its core, and / or all of the countless packages it contains, in any way you find fit. This allows you to install the right software environment for all of your web applications irrespective of their specifications. As a result of the popularity of the Operating System, Ubuntu has huge developer and user communities, which means that you will always find numerous materials on the Internet related to any question or problem which you may have.