CentOS is one of the most widely used Operating Systems for hosting servers. It's one of the many Linux distributions out there, yet what distinguishes it from all of the rest is its long-term support, which guarantees that you will always have a stable and protected Operating System. Every CentOS version that is released is supported for a decade, that's a lot longer than with any other OS available on the market. CentOS also has a much more numerous developer community than other distributions, so in case you encounter any problem or have some questions, you'll be able to quickly get the info that you need. CentOS is considered to be one of the best server Operating Systems, as it's very stable and secure, that makes it really reliable even if you host private data. Considering that it is open-source, you are able to modify any 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, since you won't have to pay license fees of any type.