CentOS is short for Community Enterprise Operating System. This is one of the best Linux releases for servers and it's well known as one of the most reliable and protected Operating Systems on the market. CentOS is open-source software, which means that you are able to personalize it in whatever way you see fit, adding and removing packages or updating the program code of any of them. It's also free to distribute and use, so you won't have to pay any kind of license fees, meaning that the total price that you will have to pay for a server running CentOS will be lower than the price for a server running another OS. What makes CentOS unique among various other Linux distributions is its huge developer society, which will help you discover the reply to any question or problem you may have. What's more, each version that is released officially is supported for 10 years, that's is a lot longer than with any alternative OS. This means frequent protection and stability updates which provides a reliable software environment for your web apps in the long run.