Ubuntu – “Welcome to emergency mode!” Think it is a fsck problem

bootfsckpermissions

My computer booted to a black screen with this error message.

Welcome to emergency mode! After logging in,type "journalctl -xb" to view   
system logs, "systemctl reboot" to reboot, "systemctl default" or ^D to   
try again to boot into default mode.

journalctl -xb snippet (what I think is wrong):

-- Unit systemd-fsckd.service has begun starting up.
juli 09 15:40:16 kim-SSD-Sationary systemd-fsck[414]: /dev/sdb1 contains a file system with errors, check forced.
juli 09 15:40:16 kim-SSD-Sationary systemd-fsck[414]: /dev/sdb1: Inodes that were part of a corrupted orphan linked list found.
juli 09 15:40:16 kim-SSD-Sationary systemd-fsck[414]: /dev/sdb1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
juli 09 15:40:16 kim-SSD-Sationary systemd-fsck[414]: (i.e., without -a or -p options)
juli 09 15:40:16 kim-SSD-Sationary systemd-fsck[414]: fsck failed with error code 4.
juli 09 15:40:16 kim-SSD-Sationary systemd-fsck[414]: Running request emergency.target/start/replace
juli 09 15:40:16 kim-SSD-Sationary systemd[1]: systemd-fsck-root.service: main process exited, code=exited, status=1/FAILURE
juli 09 15:40:16 kim-SSD-Sationary systemd[1]: Failed to start File System Check on Root Device.
-- Subject: Unit systemd-fsck-root.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit systemd-fsck-root.service has failed.
-- 
-- The result is failed.
juli 09 15:40:16 kim-SSD-Sationary systemd[1]: Unit systemd-fsck-root.service entered failed state.
juli 09 15:40:16 kim-SSD-Sationary systemd[1]: systemd-fsck-root.service failed.
juli 09 15:40:16 kim-SSD-Sationary systemd[1]: Starting Remount Root and Kernel File Systems...
-- Subject: Unit systemd-remount-fs.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

I ignored other errors like: ACPI PCC probe failed, nvidia not proprietary, etc.

I can access my PC by pressing Ctrl+D , but it is annoying.

Best Answer

  • You could run fsck from Ubuntu Live.

    1. Switch on your computer. Boot into a Ubuntu Live DVD/USB (try it without installing).
    2. After it loads, open a terminal by pressing Ctrl+Alt+T
    3. In the terminal, run:

      sudo -i
      fdisk -l
      

      fdisk will inform you what your partition / (root) is called. In this question it is /dev/sdb1.

      Then you should continue by running:

      umount /dev/sdb1
      fsck -y /dev/sdb1
      poweroff
      

      If the umount command complains that sdb1 is "not mounted", that is not a problem. We wanted it to be "not mounted" :).

    4. Remove the DVD/USB. Switch your computer on again, to boot from the SSD.

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