Ubuntu is a well known desktop Operating System, which uses the Linux kernel, but its server version is getting pretty popular as well. The main reason is the fact that the operating system is extremely light and it will function on almost any kind of hardware without issues, utilizing its resources to the max. Ubuntu is also very reliable and secure and all of the Long-Term Support (LTS) versions are supported for a minimum of five years, which warrants that you should have a safe and stable software environment on your web hosting server all the time. In addition, Ubuntu has one of the largest user communities on earth, which means that if you experience any problem or have any question, you will find lots of resources online. One of the basic advantages of this Operating System is the fact that it has a large number of software packages that can be easily changed according to your needs as well as the requirements of the applications that you intend to run, not to mention that you won't have to pay any kind of license fees any time. In contrast, other OS's are paid and their code isn't accessible, therefore it cannot be changed.