Next, ensure the BaseOS and AppStream repositories are enabled as follows. Step 4: Confirm BaseOS and AppStream Repositories Are Enabled If you are starting from RHEL 8, skip this step. If you had previously performed an in-place upgrade from RHEL 7 to RHEL 8, you need to purge the /root/tmp_leapp_p圓 directory with the following command: Step 3: Delete the “tmp_leapp_p圓” Directory If this is not the case, you will need to register and subscribe your RHEL system to the Red Hat Customer Portal before continuing to Step 3. If your RHEL 8 system has a subscription, the following output will be displayed: $ sudo subscription-manager list -installed To do so, open your terminal and execute the following command: Next, you need to confirm your system has an active Red Hat subscription. $ cat /etc/redhat-release Step 2: Verify You Have a Red Hat Enterprise Linux Server Subscription
Once the upgrade is complete, verify that you are running RHEL 8.6 as follows. If you have an older release, then upgrade it to RHEL 8.6 as follows. To perform the in-place upgrade from RHEL 8 to RHEL 9, you need to be running RHEL 8.6, which is the required source OS version. Minimum boot partition of 100MB (500MB recommended).A fast and reliable internet connection.An instance of Red Hat Enterprise Linux 8.Prerequisitesīefore you begin, please ensure you have the following set of requirements: In this tutorial, we’ll demonstrate how to perform an in-place upgrade from RHEL 8 to RHEL 9. An image builder tool for creating custom RHEL system images in a variety of formats.Ĭheck out the release notes for the most detailed and comprehensive list of all the new features and improvements in RHEL 9.Newer versions of language runtimes such as Python 3.9, Node.js 16, PHP 8.0, and Ruby 3.0.3 to mention a few.Security enhancements for SELinux and OpenSSH.Critical kernel security updates and patches can be applied without the need for scheduling downtime. Live kernel patching using the Cockpit web console.Improvements in the Cockpit web console, such as an enhanced performance metric page that helps identify issues from high memory and CPU utilization to bandwidth spikes.
Some of the notable improvements and enhancements in the latest release include: RHEL 9 brings major changes that seek to enhance performance, improve stability, and boost security. The latest release of Red Hat Enterprise Linux 9 (RHEL 9) was officially made generally available (GA) by Red Hat on May 17, 2022, taking over from the beta version released on November 2, 2021.
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