Ubuntu is a widespread desktop Operating System, which uses the Linux kernel, but its server version is getting pretty popular as well. The reason is the fact that the operating system is amazingly light and it can function on almost any hardware without issues, utilizing its resources to the fullest. Ubuntu is also very reliable and secure and all the Long-Term Support (LTS) versions are supported for at least 5 years, which warrants that you should have a safe and stable software environment on your web hosting server all of the time. Furthermore, Ubuntu has one of the biggest user communities on the planet, so if you experience any issue or have any kind of question, you will find numerous resources on the net. One of the main advantages of this OS is the fact that it contains a large number of software packages which can be easily adjusted in accordance with your needs and the requirements of the apps which you intend to run, not to mention that you will not have to pay any license fees at all. In contrast, other OS's are paid and their code isn't accessible, thus it cannot be changed.