Ubuntu is a popular desktop OS, that uses the Linux kernel, but its server version is getting pretty popular as well. The main reason is that the OS is really light and it can run on almost any hardware without issues, utilizing its resources to the maximum. Ubuntu is also extremely reliable and secure and all of the Long-Term Support (LTS) releases are supported for a minimum of 5 years, which guarantees that you will have a protected and dependable software environment on your server all of the time. In addition, Ubuntu has one of the largest user communities worldwide, so if you experience any problem or have any question, you'll find plenty of resources on the web. One of the basic benefits of this OS is that it includes numerous software packages which can be easily adjusted according to your needs as well as the needs of the apps that you intend to run, not to mention that you will not have to pay any license fees any time. In comparison, other Operating Systems are paid and their program code isn't accessible, thus it cannot be changed.