CentOS is short for Community Enterprise Operating System. This is one of the leading Linux distributions for servers and it is regarded as being one of the most stable and risk-free Operating Systems available. CentOS is open-source software, which means that you will be able to customize it in any way you see fit, adding and removing packages or modifying the code of all of them. It's also free to distribute and use, so you will not need to pay any kind of license fees, which means that the total price that you will need to pay for a server making use of 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 community, that will help you find the answer to any question or problem you may have. What's even more, each version which is released officially is supported for ten years, that's is much longer than with any other operating system. What this means is ordinary security and stability updates that will provide a dependable software environment for all your web apps in the long run.