Ubuntu is a very popular Operating System, which uses the Linux kernel. Even though it is used mainly on PCs, its server version has been becoming more popular recently as well. Ubuntu is among the lightest Linux distributions you can get and it supports almost any kind of hardware, which makes it a universal Operating System. In addition, it is very stable and secure and has an at the very least a 5-year support life cycle, so you're able to receive official security and performance updates. Unlike various other OS's, Ubuntu is distributed with no license fees and you're able to modify its core, or all of the thousands of packages it comes with, in any way you find fit. This enables you to set up the right software environment for your web applications regardless of their specifications. Because of the popularity of the OS, Ubuntu has large developer and user communities, so that you will always find a lot of materials on the Internet related to any question or problem which you might have.