Ubuntu is a widespread 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 kind of hardware with no issues, utilizing its resources to the max. Ubuntu is also really reliable and secure and all Long-Term Support (LTS) versions are supported for a minimum of five years, which guarantees that you should have a secure and dependable software environment on your web hosting server at all times. In addition, Ubuntu has one of the biggest user communities on the planet, so if you experience any problem or have any question, you will find lots of resources online. One of the main benefits of this Operating System is that it comes with thousands of software packages that can be easily changed according to your needs as well as the needs of the apps that you want to run, not to mention that you will not have to pay any kind of license fees at any time. In comparison, other Operating Systems are paid and their code is not accessible, therefore it can't be changed.