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Chapter 7. Performing post-upgrade tasks

This procedure lists major tasks recommended to perform after an in-place upgrade to RHEL 9.

Prerequisites

Procedure

After performing the upgrade, complete the following tasks:

  1. Remove any remaining Leapp packages from the exclude list in the /etc/dnf/dnf.conf configuration file, including the snactor package, which is a tool for upgrade extension development. During the in-place upgrade, Leapp packages that were installed with the Leapp utility are automatically added to the exclude list to prevent critical files from being removed or updated. After the in-place upgrade, these Leapp packages must be removed from the exclude list before they can be removed from the system.

    • To manually remove packages from the exclude list, edit the /etc/dnf/dnf.conf configuration file and remove the desired Leapp packages from the exclude list.
    • To remove all packages from the exclude list:

      # dnf config-manager --save --setopt exclude=''
  2. Remove remaining RHEL 8 packages, including remaining Leapp packages.

    1. Locate remaining RHEL 8 packages:

      # rpm -qa | grep -e '\.el[78]' | grep -vE '^(gpg-pubkey|libmodulemd|katello-ca-consumer)' | sort
    2. Remove remaining RHEL 8 packages, including the old kernel package, from your RHEL 9 system.
    3. Remove remaining Leapp dependency packages:

      # dnf remove leapp-deps-el9 leapp-repository-deps-el9
  3. Re-evaluate and re-apply your security policies. Especially, change the SELinux mode to enforcing. For details, see Applying security policies.