Ubuntu is a preferred desktop Operating System, that uses the Linux kernel, but its server version is getting very popular as well. The reason is the fact that the OS is really light and it will run on almost any 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 at least 5 years, which guarantees that you should have a safe and stable software environment on your website hosting server at all times. Also, Ubuntu has one of the largest user communities on the planet, which means that if you experience any problem or have any question, you'll discover lots of resources online. One of the key benefits of this OS is the fact that it contains numerous software packages that can be freely changed according to your needs and the needs 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 comparison, other OS's are paid and their program code is not accessible, thus it can't be changed.