CentOS is an abbreviation for Community Enterprise Operating System. This is one of the top Linux distributions for servers and it's recognized as one of the most reliable and secure Operating Systems available. CentOS is open-source software, which means that you'll be able to customize it in any way you see fit, adding and removing packages or changing the code of all of them. It is also free to distribute and use, so you will not need to pay any kind of license fees, meaning that the total price that you'll need to pay for a server running CentOS will be more affordable as compared to 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 discover the answer to any question or problem you may have. What's even more, each version that is released officially is supported for ten years, that is is a lot longer than with any alternative OS. What this means is regular protection and stability updates that will provide a dependable software environment for all your web apps in the long run.