Ubuntu is a widely used desktop OS, which uses the Linux kernel, but its server version is getting pretty popular as well. The reason is the fact that the OS is amazingly light and it will function on almost any hardware with no issues, utilizing its resources to the max. Ubuntu is also pretty reliable and secure and all Long-Term Support (LTS) versions are supported for a minimum of five years, which warrants that you should have a risk-free and dependable software environment on your web hosting server all of the time. Also, Ubuntu has one of the biggest user communities on the planet, so if you experience any problem or have any kind of question, you'll find a number of resources online. Among the major advantages of this Operating System is the fact that it has numerous software packages that can be easily changed in accordance with your needs and / or the requirements of the applications which you would like to run, not to mention that you will not have to pay any license fees at any time. In contrast, other Operating Systems are paid and their code isn't accessible, which means that it can't be changed.