Ubuntu is a popular desktop OS, that uses the Linux kernel, and its server version is getting really 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 fullest. Ubuntu is also very reliable and secure and all of the Long-Term Support (LTS) editions are supported for at least 5 years, which guarantees that you will have a secure and dependable software environment on your hosting server all the time. Also, Ubuntu has one of the largest user communities in the world, which means that if you experience any problem or have any question, you will discover plenty 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 which can be easily changed in accordance with your needs and / or the needs of the apps which you'd like to run, not to mention that you won't have to pay any license fees any time. In comparison, other Operating Systems are paid and their program code is not accessible, thus it can't be changed.