Ubuntu is a well known desktop OS, that uses the Linux kernel, but its server release is getting quite popular too. The main reason is the fact that the operating system is amazingly light and it can run on almost any hardware without any issues, utilizing its resources to the max. Ubuntu is also pretty reliable and secure and all Long-Term Support (LTS) versions are supported for a minimum of 5 years, which warrants that you will have a protected and stable software environment on your web hosting server at all times. In addition, Ubuntu has one of the biggest user communities in the world, which means that if you experience any problem or have any kind of question, you will discover lots of resources on the Internet. Among the main advantages of this Operating System is that it contains numerous software packages that can be easily modified according to your needs and / or the requirements of the apps which you would like to run, not to mention that you won't have to pay any license fees at any time. In comparison, other OS's are paid and their program code isn't accessible, which means that it cannot be changed.