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 dependable and risk-free Operating Systems out there. CentOS is open-source software, which means that you will be able to customize it in whatever way you see fit, adding and removing packages or changing the program code of all of them. It's also free to distribute and use, so you will not need to pay any kind of license fees, which means that the total price that you'll need to pay for a server making use of CentOS will be much lower than the price for a server running another OS. What makes CentOS unique among various other Linux releases is its huge developer society, that will help you get the reply to any kind of question or problem you might have. What's even more, each version that is released officially is supported for a decade, that's is longer than with any alternative operating system. This means routine security and stability updates which provides a great software environment for your web applications in the long run.