CentOS is an abbreviation for Community Enterprise OS. This is one of the leading Linux distributions for servers and it's regarded as one of the most reliable and safe Operating Systems on the market. CentOS is open-source software, so you can personalize it in any way you see fit, adding and removing packages or updating the program code of all of them. It's also free to distribute and use, so you will not need to pay any kind of license fees, which means that the overall price that you will need to pay for a server making use of CentOS will be cheaper as compared to the price for a server working with another OS. What makes CentOS unique among other Linux distributions is its huge developer society, which will help you discover the answer to any kind of question or problem you have. What's even more, each version that's released officially is supported for 10 years, that is is longer than with any other OS. This means ordinary protection and stability updates that provides a stable software environment for all of your web applications in the long run.