NetworkManager Service fails with Failed to read configuration: /etc/NetworkManager/*.conf

Solution Verified - Updated -

Issue

  • NetworkManager.service fails while restarting NetworkManager service. The following messages are logged:
Raw
Apr  8 15:09:05 rhel8 systemd[1]: Starting Network Manager...
Apr  8 15:09:05 rhel8 NetworkManager[3050]: Failed to read configuration: /etc/NetworkManager/conf.d/90-dns.conf: Key file contains line “~” which is not a key-value pair, group, or comment     <<<<------
Apr  8 15:09:05 rhel8 systemd[1]: NetworkManager.service: Main process exited, code=exited, status=1/FAILURE
Apr  8 15:09:05 rhel8 systemd[1]: NetworkManager.service: Failed with result 'exit-code'.
Apr  8 15:09:05 rhel8 systemd[1]: Failed to start Network Manager.
Apr  8 15:09:05 rhel8 systemd[1]: NetworkManager.service: Service RestartSec=100ms expired, scheduling restart.
Apr  8 15:09:05 rhel8 systemd[1]: NetworkManager.service: Scheduled restart job, restart counter is at 5.
Apr  8 15:09:05 rhel8 systemd[1]: Stopped Network Manager.
Apr  8 15:09:05 rhel8 systemd[1]: NetworkManager.service: Start request repeated too quickly.
Apr  8 15:09:05 rhel8 systemd[1]: NetworkManager.service: Failed with result 'exit-code'.
Apr  8 15:09:05 rhel8 systemd[1]: Failed to start Network Manager.
Apr  8 15:09:14 rhel8 systemd[1]: NetworkManager-dispatcher.service: Succeeded.

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • NetworkManager

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