CentOS is one of the most preferred Linux-based server Operating Systems available on the market. It's preferred by a large number of web hosting service providers, as it's very stable, reliable and secure, not to mention that it is freely customizable, because it's an open-source OS. CentOS is used for production servers, as it's also very quick and takes negligible resources. On top of that, you are able to install and run any web app, provided that it can function on a Linux computer system. When you use a CentOS-powered server, you are able to customize any part of your Operating System in accordance with your needs. The fact that CentOS is free does mean that you will need to pay just for your server, but not for any sort of license fees, that will lower your overall expenses. A large group of developers and users is behind CentOS, so if you ever encounter any problems, or you're simply not sure how to perform a particular task, you'll be able to discover a solution very quickly. A significant advantage of the OS is also the fact that every release is officially supported and updated for no less than ten years, so you'll always have a secure and stable software environment.