Ubuntu is a really popular Operating System, that uses the Linux kernel. Though it's used primarily on personal computers, its server version has been rising in popularity nowadays as well. Ubuntu is among the lightest Linux distributions available and it supports almost any hardware, that makes it a universal OS. It's also very stable and secure and has an no less than a 5-year support life cycle, so you are able to receive official protection and performance updates. Unlike lots of other Operating Systems, Ubuntu is distributed without any license fees and you will be able to modify its core, or all of the thousands of packages it contains, in any way you find fit. This allows you to install the best software environment for your web applications irrespective of their requirements. Due to the popularity of the Operating System, Ubuntu has vast developer and user communities, so you can always find find plenty of materials on the world wide web regarding any question or problem which you may have.