Ubuntu is a well known desktop OS, that uses the Linux kernel, and its server version is getting very popular too. The main reason is that the OS is really light and it can function on almost any kind of hardware without any issues, utilizing its resources to the max. Ubuntu is also really reliable and secure and all the Long-Term Support (LTS) releases are supported for at least five years, which warrants that you should have a safe and dependable software environment on your server all the time. Also, Ubuntu has one of the largest user communities worldwide, which means that if you experience any issue or have any question, you'll discover numerous resources on the Internet. Among the major benefits of this Operating System is that it includes tens of thousands of software packages that can be freely customized in accordance with your needs as well as the needs of the applications that you want to run, not to mention that you won't have to pay any license fees at any time. In comparison, other Operating Systems are paid and their program code is not accessible, therefore it cannot be changed.