Our UNIX team want to do an inline OS upgrade to RedHat Linux.
Dx NetOps Performance Management - any version
See: Operating System Requirements
RHEL 8.1 has been tested, but 8.5 is untested, but "should work". It is advised that database backups, and VM snapshots are done before attempting to upgrade the OS. Also all services should be shutdown before attempting to do an in-place OS upgrade