Ubuntu is an extremely popular OS, which uses the Linux kernel. Although it's used primarily on PCs, its server version has been becoming more popular recently as well. Ubuntu is one of the lightest Linux distributions available and it supports almost any hardware, which makes it a universal Operating System. In addition, it is very stable and secure and has an no less than a five-year support life cycle, so you're able to get official safety and performance updates. Unlike a number of other OS's, Ubuntu is distributed without license fees and you can modify its core, or all of the thousands of packages it comes with, in any way you find fit. This will allow you to set up the proper software environment for your web applications regardless of their specifications. Due to the popularity of the Operating System, Ubuntu has large developer and user communities, so that you will always find plenty of materials on the web regarding any question or problem which you may have.