systemd failed with "Failed to initialize D-Bus connection: No such file or directory" after D-Bus System Message Bus starts

Solution Verified - Updated -

Issue

  • Some services failed to start on system boot, including polkitd.
  • systemd output the following error after D-Bus System Message Bus service started.
systemd[1]: Listening on D-Bus System Message Bus Socket.
systemd[1]: Started D-Bus System Message Bus.
systemd[1]: Failed to initialize D-Bus connection: No such file or directory

Environment

Red Hat Enterprise Linux 7
/var is on remote file system

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