CentOS is one of the most widely used Operating Systems for hosting servers. It's one of the numerous Linux distributions out there, yet what differentiates it from all the others is its long-term support, which guarantees that you'll always have a reliable and secure Operating System. Every CentOS version that is released is supported for a decade, that is a lot longer than with any other OS out there. CentOS also has a much larger developer community than other distributions, so in case you encounter any kind of problem or have any questions, you'll be able to instantly discover the info that you need. CentOS is regarded as among the best server Operating Systems, since it's very stable and protected, that makes it really reliable even if you host confidential info. Since it is open-source, you're able to modify every part of it and personalize it according to your requirements, not to mention that the overall cost for a CentOS-based server will be lower, as you won't have to pay license fees of any sort.