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Red Hat Enterprise Linux 9 was announced at Red Hat Summit on May 10, 2022, and has officially released on May 17, 2022.

This release is designed to meet the needs of the hybrid cloud environment, and is ready for you to develop and deploy from the edge to the cloud. It can run your code efficiently whether deployed on physical infrastructure, in a virtual machine, or in containers built from Red Hat Universal Base Images (UBIs).

The RHEL 9 UBI is available in standard, micro, minimal or init image configurations, which range in size from as small as 7.5MB up to 80MB. Learn more about how to build, run, and manage containers.

The Red Hat Enterprise Linux 9 web console has an enhanced performance metrics page that helps identify potential causes of high CPU, memory, disk, and network resource usage spikes. In addition, subsystem metrics can be easily exported to a Grafana server.

RHEL 9 also now supports kernel live patching via the web console. The latest critical kernel security patches and updates can be applied immediately without any need for scheduled downtime, and without disrupting ongoing development or production applications.

In-place upgrade from RHEL 8 to RHEL 9

  • From RHEL 8.6 to RHEL 9.0 on the following architectures:
    • 64-bit Intel
    • 64-bit AMD
    • 64-bit ARM
    • IBM POWER 9 (little endian)
    • IBM Z architectures, excluding z13
  • From RHEL 8.6 to RHEL 9.0 on systems with SAP HANA

For more information, see Supported in-place upgrade paths for Red Hat Enterprise Linux.

For instructions on performing an in-place upgrade, see Upgrading from RHEL 8 to RHEL 9.

For the support see this table:

RHEL 9 Planning Guide