CentOS is short for Community Enterprise OS. This is one of the top Linux distributions for servers and it is recognized as being one of the most stable and risk-free Operating Systems out there. CentOS is open-source software, so you'll be able to customize it in any way you see fit, adding and removing packages or changing the program code of all of them. It's also free to distribute and use, so you won't need to pay any license fees, meaning that the total price that you'll have to pay for a server making use of CentOS will be cheaper as compared to the price for a server running some other OS. What makes CentOS stand out among various other Linux distributions is its huge developer society, which will help you discover the answer to any kind of question or problem you may have. What's even more, each version that's released officially is supported for 10 years, which is longer than with any other OS. This means routine security and stability updates which provides a reliable software setting for all of your web apps in the long run.