CentOS is an abbreviation for Community Enterprise OS. This is one of the leading Linux distributions for servers and it is recognized as one of the most reliable and safe Operating Systems available. CentOS is open-source software, so you'll be able to personalize 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 have to pay any license fees, meaning that the overall price that you will need to pay for a server running CentOS will be cheaper than the price for a server running some other OS. What makes CentOS unique among other Linux distributions is its huge developer community, which will help you discover the answer to any kind of question or problem you might have. Furthermore, each version that is released officially is supported for a decade, that's is much longer than with any other operating system. What this means is ordinary protection and stability updates which provides a great software setting for all of your web applications in the long run.