CentOS is short for Community Enterprise Operating System. This is one of the leading Linux releases for servers and it is regarded as one of the most stable and secure Operating Systems available. CentOS is open-source software, so you can customize it in whatever way you see fit, adding and removing packages or updating the program code of any of them. It's also free to distribute and use, so you will not need to pay any license fees, which means that the total price that you'll need to pay for a server running CentOS will be more affordable than the price for a server working with an alternative OS. What makes CentOS unique among other Linux distributions is its huge developer society, that will help you get the reply to any kind of question or problem you have. What's more, each version which is released officially is supported for a decade, that's is a lot longer than with any alternative operating system. This means ordinary safety and stability updates which will provide a stable software environment for all of your web apps in the long run.