CentOS is one of the most widely used Operating Systems for hosting servers. It's one of the countless Linux distributions out there, however what distinguishes it from all of the rest is the long-term support, which ensures that you'll always have a reliable and protected Operating System. Each CentOS version that is released is supported for ten years, that's considerably longer than with any other OS on the market. CentOS also has a much larger developer community than other distributions, therefore if you encounter any problem or have any questions, you can instantly find the info that you need. CentOS is regarded as among the best server Operating Systems, because it is very stable and protected, that makes it very reliable even if you host confidential data. Because it is open-source, you'll be able to modify any part of it and personalize it according to your needs, not to mention that the total cost for a CentOS-based server will be lower, since you will not have to pay license fees of any sort.