CentOS is one of the most widely used Operating Systems for web hosting servers. It is one of the many Linux releases out there, but what distinguishes it from all the others is its long-term support, which ensures that you will always have a reliable and safe OS. Each CentOS version that is released is supported for 10 years, that is considerably longer than with almost every other OS available. CentOS also has a much larger developer community than other distributions, therefore in the event you encounter any kind of problem or have any questions, you'll be able to promptly get the information which you need. CentOS is considered to be one of the best server Operating Systems, due to the fact that it's very stable and secure, that makes it very reliable even if you host confidential info. Considering that it is open-source, you are able to modify each and every part of it and customize it according to your needs, not to mention that the total cost for a CentOS-based server will be lower, as you won't need to pay license fees of any type.