CentOS Linux is GPL according to a specification, and the use of RedHat Enterprise Linux (RHEL) source code (source code) to re-build (compile) the Linux version.
CentOS and RHEL to provide almost 100 percent of the Binary file compatibility, the same version (Release) and maintenance (Maintainence) updated. And RedHat Enterprise Linux (RHEL) The difference is that, CentOS according to the norms GPL, remove the RedHat brand and image.
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