GNU/Linux RedHat 9 Updating System Guide
How to Update Packages & System in Red Hat GNU/Linux Enterprise 9.x – Step by step Tutorial.
And here I explain How to Update Linux RedHat easily on Command Line.
But at your choice there is also the possibility to see instead: How to Update System with GUI.
Especially relevant: after if the suited result is Not achieved, you may be also interested about How to Upgrade Kernel on RHEL.

1. Terminal QuickStart
How to QuickStart with Command Line on RHEL:
Contents