Ubuntu is a popular desktop OS, which uses the Linux kernel, and its server version is getting really popular too. The main reason is that the operating system is really light and it can function on almost any hardware without any issues, utilizing its resources to the max. Ubuntu is also very reliable and secure and all Long-Term Support (LTS) versions are supported for a minimum of five years, which guarantees that you will 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, so if you experience any kind of problem or have any question, you will find plenty of resources online. Among the basic advantages of this Operating System is that it contains a great number of software packages that can be easily adjusted according to your needs as well as the needs of the apps 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, therefore it cannot be changed.