Ubuntu is a really popular OS, which uses the Linux kernel. Although it is used mainly on PCs, its server version has been rising in popularity recently as well. Ubuntu is one of the lightest Linux releases available and it is compatible with almost any hardware, which makes it a universal Operating System. It's also very stable and secure and has an at least a 5-year support life cycle, so you'll be able to get official safety and performance updates. Unlike various other OS's, Ubuntu is distributed with no license fees and you're able to customize its core, as well as any of the thousands of packages it contains, in any way you find fit. This enables you to install the proper software environment for all your web applications whatever their specifications. Due to the popularity of the Operating System, Ubuntu has huge developer and user communities, so that you can always find find numerous materials on the Internet regarding any question or problem which you might have.