CentOS is short for Community Enterprise OS. This is one of the leading Linux releases for servers and it's regarded as being one of the most reliable and risk-free Operating Systems out there. 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 code of any of them. It is also free to distribute and use, so you will not need to pay any license fees, meaning that the overall price that you will need to pay for a server running CentOS will be lower as compared to the price for a server working with some other OS. What makes CentOS unique among various other Linux releases is its huge developer society, which will help you find the answer to any question or problem you might have. What's more, each version that's released officially is supported for ten years, which is longer than with any other OS. This means frequent safety and stability updates that will provide a stable software setting for all your web apps in the long run.