CentOS is an abbreviation for Community Enterprise Operating System. This is one of the top Linux releases for servers and it's regarded as being one of the most stable and risk-free Operating Systems available. CentOS is open-source software, which means that you will be able to customize it in any way you see fit, adding and removing packages or modifying the program code of any of them. It is also free to distribute and use, so you will not have to pay any license fees, which means that the overall price that you'll need to pay for a server running CentOS will be more affordable than the price for a server working with an alternative OS. What makes CentOS unique among various other Linux releases is its huge developer community, that will help you discover the reply to any kind of question or problem you might have. What's even more, each version that's released officially is supported for 10 years, which is much longer than with any alternative OS. This means frequent safety and stability updates that will provide a reliable software setting for your web apps in the long run.