CentOS is one of the most widely used Operating Systems for hosting servers. It's one of the many Linux releases out there, but what distinguishes it from the others is the long-term support, which guarantees that you will always have a reliable and secure OS. Each CentOS version that is released is supported for ten years, which is a lot longer than with almost every other OS available on the market. CentOS also has a much larger developer community than other distributions, so in the event you encounter any kind of problem or have any questions, you're able to promptly find the data that you need. CentOS is considered to be among the best server Operating Systems, as it is very stable and secure, that makes it very reliable even if you host confidential info. Because it is open-source, you can modify every part of it and personalize it according to your requirements, not to mention that the total cost for a CentOS-based server will be lower, because you won't have to pay license fees of any sort.