Ubuntu is an exceptionally popular Operating System, that makes use of the Linux kernel. Although it is used primarily on desktop machines, its server version has been becoming more popular these days as well. Ubuntu is one of the lightest Linux distributions you can get and it is compatible with almost any kind of hardware, which makes it a universal OS. It is also very stable and secure and has an at least a five-year support life cycle, so you'll be able to get official security and performance updates. Unlike many other Operating Systems, Ubuntu is distributed without license fees and you will be able to customize its core, and / or all of the countless packages it features, in any way you see fit. This will allow you to install the best software environment for all your web apps whatever their specifications. Due to the popularity of the OS, Ubuntu has large developer and user communities, which means that you will always find plenty of materials online about any question or problem which you might have.