How to disable NetworkManager in RHEL?

Solution Verified - Updated 2022-10-10T05:02:25+00:00 -

Issue

Disabling NetworkManager
- What steps are needed to disable the NetworkManager service?
- What is needed to ensure it does not start again on a subsequent reboot?
Disabled NetworkManager but still seeing errors (need to fully disable)
- Trouble configuring networking with NetworkManager and need to disable.
- Disabled NetworkManager but still seeing errors about it and "Connection activation failed"

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