CentOS is short for Community Enterprise OS. This is one of the top Linux releases for servers and it is regarded as being one of the most dependable and risk-free Operating Systems available. CentOS is open-source software, so you can customize it in any way you see fit, adding and removing packages or modifying 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 cheaper 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 community, that will help you find the reply to any kind of question or problem you may have. What's more, each version that is released officially is supported for 10 years, which is much longer than with any alternative OS. What this means is regular safety and stability updates which will provide a reliable software environment for all of your web apps in the long run.