How to boot RHEL7 with systemd in an interactive mode (like earlier versions "Press I for interactive mode")

Solution Verified - Updated 2016-01-05T15:42:52+00:00 -

Issue

Versions of RHEL prior to RHEL 7 allowed pressing I ("i") during boot to enter an interactive mode where each service-start operation could be confirmed or denied. How can we do this with RHEL 7 and systemd?

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