Ubuntu is a popular desktop Operating System, that uses the Linux kernel, and its server release is getting very popular as well. The main reason is the fact that the OS is amazingly light and it'll run on almost any hardware without issues, utilizing its resources to the fullest. Ubuntu is also extremely reliable and secure and all the Long-Term Support (LTS) releases are supported for at least 5 years, which warrants that you will have a risk-free and stable software environment on your web hosting server all the time. Furthermore, Ubuntu has one of the largest user communities worldwide, so if you experience any problem or have any question, you will find lots of resources on the Internet. Among the basic advantages of this OS is the fact that it contains a large number of software packages that can be freely customized according to your needs and the needs of the applications that you need to run, not to mention that you won't have to pay any license fees at all. In contrast, other OS's are paid and their code isn't accessible, which means that it cannot be changed.