Ubuntu is a popular desktop Operating System, which uses the Linux kernel, but its server edition is getting very popular too. The main reason is that the operating system is extremely light and it can function on almost any kind of hardware without issues, utilizing its resources to the fullest. Ubuntu is also very reliable and secure and all of the Long-Term Support (LTS) releases are supported for a minimum of 5 years, which warrants that you should have a protected and stable software environment on your web hosting server at all times. Furthermore, Ubuntu has one of the biggest user communities on the planet, which means that if you experience any problem or have any kind of question, you'll discover lots of resources online. One of the main benefits of this OS is that it contains thousands of software packages that can be freely adjusted according to your needs and / or the requirements of the apps which you would like to run, not to mention that you will not have to pay any kind of license fees at all. In comparison, other Operating Systems are paid and their program code is not accessible, therefore it can't be changed.