CentOS is short for Community Enterprise Operating System. This is one of the top Linux releases for servers and it's well known as being one of the most stable and risk-free Operating Systems on the market. CentOS is open-source software, which means that you'll be able to personalize it in whatever way you see fit, adding and removing packages or altering the program code of any of them. It's also free to distribute and use, so you won't have to pay any license fees, which means that the total price that you'll have to pay for a server running CentOS will be lower than the price for a server running some other OS. What makes CentOS unique among various other Linux releases is its huge developer community, which will help you get the reply to any kind of question or problem you might have. In addition, each version that is released officially is supported for ten years, that's is a lot longer than with any other OS. This means routine protection and stability updates that will provide a great software setting for your web apps in the long run.