Ubuntu is an extremely popular Operating System, that employs the Linux kernel. Though it's used primarily on desktops, its server version has been becoming more popular recently as well. Ubuntu is among the lightest Linux releases you can get and it supports almost any kind of hardware, that makes it a universal Operating System. It's also very stable and secure and has an a minimum of a five-year support life cycle, so you can get official security and performance updates. Unlike a number of other Operating Systems, Ubuntu is distributed with no license fees and you're able to customize its core, and any of the numerous packages it contains, in any way you find fit. This will allow you to set up the right software environment for your web applications whatever their specifications. As a result of the popularity of the OS, Ubuntu has vast developer and user communities, so you will always find a lot of materials online about any question or problem which you may have.