Ubuntu is a popular desktop Operating System, that uses the Linux kernel, and its server edition is getting really popular too. The reason is that the OS is extremely light and it can function on almost any hardware without issues, utilizing its resources to the max. Ubuntu is also extremely reliable and secure and all Long-Term Support (LTS) releases are supported for a minimum of 5 years, which warrants that you should have a secure and stable software environment on your hosting server all the time. Also, Ubuntu has one of the largest user communities on earth, so if you experience any difficulty or have any question, you'll find numerous resources on the web. One of the basic advantages of this Operating System is that it includes a great number of software packages that can be easily adjusted according to your needs as well as the requirements of the applications which you would like to run, not to mention that you won't have to pay any license fees at all. In comparison, other Operating Systems are paid and their program code is not accessible, thus it cannot be changed.