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boot messages with errors

When I restart my Ubuntu 18.04 system, it suddenly crashes and shows a long list of [FAILED] messages as shown above, for example:

[FAILED] Failed to mount Mount unit for gtk-common-themes, revision 1198
See 'systemctl status "snap-gtk\\x2dcommon\\x2dthemes-1198.mount"' for details

and other mount errors like

[FAILED] Failed to mount FUSE Control File System

What could be the problem here, and how can I fix it?

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  • I welcome to ask ubuntu. If you can copy and paste the output of the error into your question and wrap it in code brackets {} that would be awesome. thanks! Jul 24, 2019 at 21:51
  • Thanks@Joshua Besneatte however I am getting error in boot level I took pictures but cannot upload here it's giving me error while upload pictures in ask Ubuntu
    – Abhirock
    Jul 25, 2019 at 3:05
  • The error will be stored in /var/log/ (probably kern.log or syslog) Oh and regarding the image: you need the 1st error... what you show us are results from a previous problem.
    – Rinzwind
    Jul 25, 2019 at 10:36
  • thanks@ Rinzwind sorry when I restart my laptop only this error come on my screen
    – Abhirock
    Jul 25, 2019 at 10:39
  • Looks like you have a corrupt system. You can boot into Live Ubuntu and try running fsck to repair the system. If that doesn't work and you don't have a an image back-up of your system, you're looking at a re-install. Jul 25, 2019 at 14:32

1 Answer 1

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If you deleted snap files manually, for instance, in order to clean up space, some .mount files were left in /etc/systemd/system/, like /etc/systemd/system/snap-core20-975.mount.

You can try the following command:

grep -r What /etc/systemd/system/|sed -E 's/.*What=(.*)/\1/g'|xargs ls -la {}

The output will be:

ls: cannot access '/var/lib/snapd/snaps/snap-postman_81.snap': No such file or directory
-rw------- 2 root root  64233472 Mai 19 22:11 /var/lib/snapd/snaps/****.snap
....

So, now you know what snaps are missing and can decide what to do, e.g. remove obsolete .mount files.

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