CentOS is one of the most widely used Operating Systems for web hosting servers. It's one of the many Linux distributions out there, but what differentiates it from the others is its long-term support, which ensures that you'll always have a stable and protected OS. Each CentOS version that is released is supported for ten years, which is considerably longer than with any other OS on the market. CentOS also has a much more numerous developer community than other distributions, so in case you experience any kind of problem or have some questions, you can quickly get the info that you need. CentOS is widely known as one of the best server Operating Systems, since it is very stable and secure, that makes it very reliable even if you host private data. Because it is open-source, you will be able to modify any part of it and personalize it according to your needs, not to mention that the overall cost for a CentOS-based server will be lower, because you will not have to pay license fees of any sort.