Whenever I shut down my Ubuntu 20.04 and reboot, I always get this message at the bottom of my screen:

Press Ctrl+C to cancel all filesystem checks in progress 

This process will take too long and press Ctrl+C does not have any effect.

How to bypass it?

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  • shutdown time is it showing?? 0r a fresh start n reboot time??
    – UnKNOWn
    Jun 14, 2020 at 3:40
  • 1
    Are you shutting down the machine cleanly? A fsck should only occur after a configured number of boots (eg. 30) or a problem was detected last shutdown (eg. power outage or system forced off before shutdown completed)
    – guiverc
    Jun 14, 2020 at 3:50
  • @user535733 The file system check is a bug in 20.04, see: bugs.launchpad.net/ubuntu/+source/casper/+bug/1875548 Jun 14, 2020 at 7:23
  • See also: askubuntu.com/search?q=20.04+filesystem+check Jun 14, 2020 at 7:31
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    @karel: I still don't see an answer on that page, (except mine), that answers the question on this page. There is the link to the manpages that mentions fsck.mode, but the manpages do not spell out a solution that a new user can use. The Question is over four years old and refers to 16.04. This bug is specific to 20.04. Jun 15, 2020 at 1:18

1 Answer 1


Removing Disk Check From 20.04 Boot

The command line option fsck.mode=skip can be used to skip the disk check when booting Ubuntu 20.04.

The line Checking disks: 0% complete may still come up but fsck will not be run, nor will boot time be increased.

Add fsck.mode=skip to the linux line in grub.cfg just before quiet splash

It is recommended to add the command to grub.cfg by editing /etc/default/grub thus: GRUB_CMDLINE_LINUX_DEFAULT="fsck.mode=skip quiet splash" and then run sudo update-grub.

I have had this problem with a Live USB but not with an installed system.

  • Not a good idea. You WANT fsck to run if it finds file system problems. Better to find/fix the reason for constant file system repairs. Also, fsck will always run when booting to a Ubuntu Live DVD/USB.
    – heynnema
    Aug 15, 2021 at 12:24
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    @heynnema: Many people have complained about file system check running after every boot of 20.04 and never actually finding a filesystem error. After a while it gets very old. askubuntu.com/search?q=20.04+filesystem+check. This happens every boot in Live systems and every boot in some installed systems. It is not much use if it doesn't help you fix things. Aug 15, 2021 at 12:59
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    The automatic filesystem check has been removed from the latest versions of Ubuntu. Sep 8, 2021 at 7:37
  • The automatic filesystem check still runs on Ubuntu 22.04, its just that it is running in the background and doesn't slow the boot process. You could confirm this by looking for /run/casper-md5check.json after choosing "Try Ubuntu". May 30 at 19:41

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