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8.3. Upgrading from RHEL 6.X to RHEL 7.X

  1. Install migration tool

    Install the tool to perform the migration from RHEL 6 to RHEL 7: 
    # yum install redhat-upgrade-tool
# yum install yum-utils

  2. Disable all repositories

    Disable all the enabled repositories: 
    # yum-config-manager --disable \*

  3. Download latest RHEL 7 ISO

    Visit the Software & Download Center in the Red Hat Customer Service Portal (https://access.redhat.com/downloads) to obtain the latest RHEL 7 ISO image file. Use a valid Red Hat Subscription to download the full installation files, obtain a free evaluation installation, or follow the links in this page to purchase a new Red Hat Subscription.
    To download the RHEL 7 installation files using a Red Hat Subscription or a Red Hat Evaluation Subscription, perform the following steps:
    1. Visit the Red Hat Customer Service Portal at https://access.redhat.com/login and enter your user name and password to log in.
    2. Click Downloads to visit the Software & Download Center.
    3. In the Red Hat Enterprise Linux area, click Download Software to download the latest version of the software.

  4. Upgrade to RHEL 7 using ISO

    Upgrade to RHEL 7 using the Red Hat upgrade tool and reboot after the upgrade process is completed: 
    # redhat-upgrade-tool --iso RHEL7_ISO_filepath --cleanup-post
# reboot

    Important

    The upgrade process is time-cosuming depending on your system's configuration and amount of data.