What are the supported use cases for upgrading to Red Hat Enterprise Linux 7?

Solution In Progress - Updated -

Environment

The source: Red Hat Enterprise Linux 5.11, or the latest minor version of Red Hat Enterprise Linux 6
The target: The latest minor version of Red Hat Enterprise Linux 7

Resolution

Red Hat Enterprise Linux 5

The only Red Hat Enterprise Linux (RHEL) 5 minor version supported for the migration to RHEL 7 is RHEL 5.11. The migration process captures the state of the RHEL 5 installation (users, groups, installed packages, firewall rules, and some other data) by creating a Kickstart file. This file is later used for the installation of RHEL 7 on a different storage.
For further details, see How to migrate Red Hat Enterprise Linux 5 to Red Hat Enterprise Linux 7 with the Preupgrade Assistant.

Red Hat Enterprise Linux 6

Only the upgrade of the latest minor version of RHEL 6 to the latest minor version of RHEL 7 is supported. The upgrade process replaces the RHEL 6 installation with the RHEL 7 installation on the storage. This process uses the Preupgrade Assistant to inform about any known incompatibilities between RHEL 6 and RHEL 7, and to resolve some of them. After running the Preupgrade Assistant, the Red Hat Upgrade Tool is used to upgrade the system.
For further details, see How do I upgrade from Red Hat Enterprise Linux 6 to Red Hat Enterprise Linux 7?.

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