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Systemd Failed To Start Services And Resulted in Error: "Failed to get D-Bus connection: No such file or directory" in Oracle Linux 7.x (Doc ID 2644460.1)

Last updated on MARCH 19, 2020

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 7.0 and later
Information in this document applies to any platform.

Symptoms

 In Oracle Linux 7.x server, systemd was broken and thus the services including SSH failed to start.

The error seen in the console logs were:

[FAILED] Failed to start udev Kernel Device Manager.
See 'systemctl status systemd-udevd.service' for details.
[ OK ] Started Flush Journal to Persistent Storage.
[ OK ] Stopped udev Kernel Device Manager.
[FAILED] Failed to start udev Kernel Device Manager.
See 'systemctl status systemd-udevd.service' for details.
[FAILED] Failed to start Configure read-only root support.
See 'systemctl status rhel-readonly.service' for details.
[ OK ] Stopped udev Kernel Device Manager.
[FAILED] Failed to start udev Kernel Device Manager.
See 'systemctl status systemd-udevd.service' for details.
[FAILED] Failed to start Load/Save Random Seed.
See 'systemctl status systemd-random-seed.service' for details.
[FAILED] Failed to start Monitoring of LVM2 ...ng dmeventd or progress polling.
See 'systemctl status lvm2-monitor.service' for details.
[ OK ] Started Apply Kernel Variables.
[FAILED] Failed to start udev Coldplug all Devices.
See 'systemctl status systemd-udev-trigger.service' for details.
[ TIME ] Timed out waiting for device dev-disk-by\x2dlabel-bootfs.device.
[DEPEND] Dependency failed for File System Check on /dev/disk/by-label/bootfs.
[DEPEND] Dependency failed for /boot.
[DEPEND] Dependency failed for Local File Systems.
[DEPEND] Dependency failed for Relabel all filesystems, if necessary.
[DEPEND] Dependency failed for Migrate local... structure to the new structure.
[DEPEND] Dependency failed for /boot/efi.
[ TIME ] Timed out waiting for device dev-ma...olGroupSys\x2dLogVolSwap.device.
[DEPEND] Dependency failed for /dev/mapper/VolGroupSys-LogVolSwap.
[DEPEND] Dependency failed for Swap.
[ TIME ] Timed out waiting for device dev-disk-by\x2dlabel-BOOTEFI.device.
[DEPEND] Dependency failed for File System Check on /dev/disk/by-label/BOOTEFI.
[ TIME ] Timed out waiting for device dev-ttyS0.device.
[FAILED] Failed to start Preprocess NFS configuration.
See 'systemctl status nfs-config.service' for details.
[FAILED] Failed to start Apply Ksplice updates.
See 'systemctl status uptrack.service' for details.
[ OK ] Reached target Timers.
[ OK ] Reached target Login Prompts.
[ OK ] Reached target Network.
[ OK ] Reached target Network is Online.

Changes

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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