Why does restart of Red Hat Enterprise Linux 7 servers hung at "A start job is running for Network Manager"

Solution Verified - Updated -

Issue

  • NetworkManager, D-Bus Errors prevents critical system services from starting.
  • On boot/restart Red Hat Enterprise Linux 7 server hung at "A start job is running for NetworkManager "
  • NetworkManager fails to start.
  • Login services then fail to start.
  • The system tries to retry starting NetworkManager repeatedly.
  • Restarting any service throws error Error getting authority: Error initializing authority: Could not connect: No such file or directory (g-io-error-quark, 1)

Environment

  • Red Hat Enterprise Linux 7

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