According to CentOS website, they use the source code from Red Hat, but I am not clear about what version of Red Hat source code is being used to build each version of CentOS.
Is there a numeric equivalent? For example, is CentOS 6.5 equivalent/based on Red Hat Enterprise Linux 6.5?
Best Answer
CentOS 6.5 is based on RHEL 6.5; prior to CentOS 7, CentOS versions exactly match RHEL versions. The pattern changed with CentOS 7, which uses something like a build number: CentOS 7 (1406) is based on RHEL 7.0, CentOS 7 (1503) is based on RHEL 7.1, etc. You'll find all the details on the CentOS wiki (look for the "Archived Versions" section).