Ubuntu is an extremely popular Operating System, which employs the Linux kernel. Although it's used mainly on personal computers, its server version has been becoming more popular these days as well. Ubuntu is one of the lightest Linux distributions out there and it's compatible with almost any hardware, that makes it a universal Operating System. In addition, it is very stable and secure and has an no less than a 5-year support life cycle, so you will be able to get official safety and performance updates. Unlike lots of other OS's, Ubuntu is distributed without license fees and you will be able to modify its core, or all of the countless packages it features, in any way you find fit. This will enable you to install the proper software environment for all your web apps irrespective of their specifications. Due to the popularity of the OS, Ubuntu has huge developer and user communities, so that you can always find find numerous materials on the web related to any question or problem which you might have.