Ubuntu is a very popular Operating System, which employs the Linux kernel. While it is used primarily on desktop machines, its server version has been becoming more popular nowadays as well. Ubuntu is one of the lightest Linux distributions 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 at least a five-year support life cycle, so you are able to get official safety and performance updates. Unlike a number of other OS's, Ubuntu is distributed without any license fees and you're able to modify its core, and / or all of the thousands of packages it contains, in any way you see fit. This enables you to install the ideal software environment for all your web apps regardless of their requirements. Due to the popularity of the OS, Ubuntu has vast developer and user communities, so that you'll always find find a lot of materials online about any question or problem that you may have.