CentOS Linux 6.7 is derived from source code released by Red Hat, Inc. for Red Hat Enterprise Linux 6.7. All upstream variants have been placed into one combined repository to make it easier for end users. Workstation, server, and minimal installs can all be done from our combined repository. All of our testing is only done against this combined distribution. There are many fundamental changes in this release, compared with the past CentOS Linux 6 releases, and we highly recommend everyone study the upstream Release Notes as well as the upstream Technical Notes about the changes and how they might impact your installation. (See the 'Further Reading' section if the CentOS release notes). All updates since the upstream 6.7 release are also on the CentOS mirrors as zero day updates. When installing CentOS-6.7 (or any other version) from any of our media, you should always run 'yum update' after the install to apply these.