Ubuntu is a well known desktop OS, which uses the Linux kernel, but its server version is getting very popular too. The reason is the fact that the operating system is amazingly light and it will function on almost any hardware without issues, utilizing its resources to the max. Ubuntu is also really reliable and secure and all Long-Term Support (LTS) versions 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 at all times. Furthermore, Ubuntu has one of the largest user communities on earth, so if you experience any problem or have any kind of question, you'll find a number of resources on the net. One of the major benefits of this Operating System is the fact that it has tens of thousands of software packages that can be easily customized in accordance with your needs and the needs of the applications which you intend to run, not to mention that you won't have to pay any license fees at any time. In comparison, other OS's are paid and their code is not accessible, which means that it can't be changed.