Ubuntu is an extremely popular Operating System, which makes use of the Linux kernel. Although it is used primarily on desktop machines, its server version has been becoming more popular nowadays as well. Ubuntu is one of the lightest Linux distributions available and it supports almost any hardware, that makes it a universal Operating System. It's also very stable and secure and has an at least a five-year support life cycle, so you will be able to receive official security and performance updates. Unlike many other Operating Systems, Ubuntu is distributed devoid of license fees and you will be able to modify its core, or all of the thousands of packages it features, in any way you find fit. This enables you to install the perfect software environment for all of your web apps irrespective of their specifications. As a result of the popularity of the OS, Ubuntu has large developer and user communities, which means that you will always find a lot of materials online regarding any question or problem that you may have.