Ubuntu is a widely used desktop Operating System, that uses the Linux kernel, but its server edition is getting really popular as well. The reason is the fact that the OS is really light and it'll run on almost any kind of hardware without issues, utilizing its resources to the fullest. Ubuntu is also extremely reliable and secure and all the Long-Term Support (LTS) editions are supported for a minimum of five years, which guarantees that you should have a secure and stable software environment on your server all the time. Furthermore, Ubuntu has one of the largest user communities globally, so if you experience any difficulty or have any kind of question, you will find lots of resources on the Internet. One of the basic benefits of this Operating System is the fact that it features a great number of software packages which can be easily modified according to your needs and the requirements of the apps that you need to run, not to mention that you will not have to pay any kind of license fees any time. In comparison, other OS's are paid and their code is not accessible, which means that it can't be changed.