How to display more verbose boot-related messages during system startup

Solution Verified - Updated -

Issue

  • How to display the boot log and other service start up messages on the display permanently.
  • How to disable the boot progress splash screen.
  • How to enable verbose kernel boot messages.
  • My system won't boot! What data can I provide Red Hat Support to troubleshoot this issue?

Environment

  • Red Hat Enterprise Linux

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