Ubuntu is a widely used desktop OS, that uses the Linux kernel, and its server version is getting really popular as well. The reason is that the operating system is extremely light and it will function on almost any kind of hardware with no issues, utilizing its resources to the max. Ubuntu is also extremely reliable and secure and all the Long-Term Support (LTS) versions are supported for at least five years, which warrants that you will have a secure and stable software environment on your hosting server all the time. In addition, Ubuntu has one of the largest user communities on earth, which means that if you experience any kind of problem or have any kind of question, you will find numerous resources on the Internet. One of the major advantages of this OS is the fact that it has thousands of software packages which can be freely adjusted according to your needs and / or the needs of the apps which you need to run, not to mention that you will not have to pay any license fees any time. In contrast, other Operating Systems are paid and their program code isn't accessible, therefore it can't be changed.