CentOS is short for Community Enterprise OS. This is one of the best Linux distributions for servers and it's recognized as one of the most reliable and risk-free Operating Systems out there. CentOS is open-source software, which means that you can personalize it in whatever way you see fit, adding and removing packages or changing the program code of any of them. It is also free to distribute and use, so you will not have to pay any kind of license fees, which means that the total price that you will need to pay for a server running CentOS will be cheaper than the price for a server running an alternative OS. What makes CentOS unique among various other Linux releases is its huge developer community, which will help you get the reply to any kind of question or problem you might have. What's even more, each version which is released officially is supported for a decade, that's is longer than with any alternative operating system. This means ordinary protection and stability updates that will provide a great software environment for all of your web applications in the long run.