CentOS is amongst the most widely used Linux-based server Operating Systems out there. It's preferred by a number of web hosting providers, because it's very stable, reliable and secure, not to mention that it is freely customizable, since it is an open-source Operating System. CentOS is used for production servers, because it is also very fast and takes negligible system resources. Also, you can set up and run any web app, as long as it can function on a Linux equipment. When you use a CentOS-powered server, you will be able to adjust any part of your Operating System in accordance with your needs. The fact that CentOS is free means that you'll need to pay just for your server, but not for any sort of license fees, that will minimize your overall expenses. A large group of developers and users stands behind CentOS, so in case you ever experience any problems, or you are simply unsure how to perform a certain task, you will be able to find a solution right away. An important advantage of the OS is also the fact that every single release is officially supported and updated for a minimum of ten years, which means that you'll always have a safe and reliable software environment.