OEL6 to OEL7 upgrade

 

From blog :  https://reguchi.wordpress.com/2019/02/27/upgrade-from-oel-6-to-7/


These are the steps:

  1. Make sure you have repositories ol6_x86_64_latest and ol6_x86_64_addons configured and enabled.
  2. Update to the latest OEL 6 version
    • yum update -y
  3. Install required packages
    • yum install redhat-upgrade-tool preupgrade-assistant preupgrade-assistant-el6toel7 preupgrade-assistant-el6toel7-data-0 preupgrade-assistant-tools preupgrade-assistant-ui openscap
  4. Run the upgrade assessment
    • preupg
  5. Review the output and if the assessment reports any fail, needs_action, or needs_inspection issues, read the remediation instructions for these issues and perform any required actions before proceeding with the upgrade.
  6. Download the ISO file from Edelivery.oracle.com. Choose version OEL 7.5.
  7. Copy the ISO to the server
  8. Run the upgrade tool
    1. redhat-upgrade-tool-cli –iso=V975367-01.iso –debuglog=/tmp/upgrade.log –cleanup-post
  9. Reboot the system to start the upgrade

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