Ubuntu is an extremely popular OS, which employs the Linux kernel. Even though it is used mainly on PCs, its server version has been gaining in popularity nowadays as well. Ubuntu is among the lightest Linux distributions available 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 at the very least a 5-year support life cycle, so you'll be able to get official protection and performance updates. Unlike alternative Operating Systems, Ubuntu is distributed without license fees and you're able to modify its core, and / or any of the numerous packages it comes with, in any way you find fit. This will allow you to install the perfect software environment for your web apps irrespective of their requirements. As a result of the popularity of the OS, Ubuntu has vast developer and user communities, which means that you'll always find find a lot of materials on the Internet related to any question or problem which you might have.