Ubuntu is a very popular OS, that makes use of 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 releases available and it's compatible with almost any hardware, which makes it a universal OS. It's also very stable and secure and has an no less than a 5-year support life cycle, so you are able to get official security and performance updates. Unlike various other OS's, Ubuntu is distributed without license fees and you are able to customize its core, or all of the numerous packages it comes with, in any way you find fit. This enables you to install the best software environment for your web applications irrespective of their specifications. Due to the popularity of the Operating System, Ubuntu has huge developer and user communities, so that you can always find find a lot of materials on the web regarding any question or problem that you might have.