Ubuntu is a well known desktop OS, which uses the Linux kernel, but its server version is getting pretty popular too. The reason is the fact that the operating system is extremely light and it will function on almost any kind of hardware with no issues, utilizing its resources to the maximum. Ubuntu is also really reliable and secure and all Long-Term Support (LTS) versions are supported for at least five years, which guarantees that you will have a secure and stable software environment on your website hosting server all the time. Furthermore, Ubuntu has one of the largest user communities around the world, so if you experience any difficulty or have any question, you will find lots of resources on the Internet. Among the main advantages of this Operating System is that it has thousands of software packages which can be freely customized according to your needs as well as the needs of the apps which you would like 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 code is not accessible, which means that it can't be changed.