CentOS is short for Community Enterprise OS. This is one of the top Linux releases for servers and it is recognized as one of the most stable and risk-free Operating Systems available. CentOS is open-source software, so you are able to customize it in any way you see fit, adding and removing packages or altering the program code of any of them. It is also free to distribute and use, so you won't have to pay any kind of license fees, meaning that the overall price that you will have to pay for a server running CentOS will be more affordable than the price for a server working with some other OS. What makes CentOS unique among other Linux releases is its huge developer society, which will help you discover the answer to any kind of question or problem you may have. Furthermore, each version that is released officially is supported for a decade, which is longer than with any alternative operating system. This means regular protection and stability updates that provides a great software setting for your web applications in the long run.