systemd-fsck@.service and systemd-fsck-root.service are services
responsible for file system checks. They are instantiated for each
device that is configured for file system checking.
systemd-fsck-root.service is responsible for file system checks on
the root file system, but only if the root filesystem was not checked
in the initramfs. systemd-fsck@.service is used for all other file
systems and for the root file system in the initramfs.
These services are started at boot if passno in /etc/fstab for the
file system is set to a value greater than zero. The file system
check for root is performed before the other file systems. Other file
systems may be checked in parallel, except when they are on the same
systemd-fsck does not know any details about specific filesystems,
and simply executes file system checkers specific to each filesystem
type (/sbin/fsck.type). These checkers will decide if the filesystem
should actually be checked based on the time since last check, number
of mounts, unclean unmount, etc.
If a file system check fails for a service without nofail, emergency
mode is activated, by isolating to emergency.target.
systemd-fsck understands these kernel command line parameters:
One of "auto", "force", "skip". Controls the mode of operation.
The default is "auto", and ensures that file system checks are
done when the file system checker deems them necessary. "force"
unconditionally results in full file system checks. "skip" skips
any file system checks.
One of "preen", "yes", "no". Controls the mode of operation. The
default is "preen", and will automatically repair problems that
can be safely fixed. "yes" will answer yes to all questions by
fsck and "no" will answer no to all questions.
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2020-07-14. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2020-07-14.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to firstname.lastname@example.org
systemd 246 SYSTEMD-FSCK@.SERVICE(8)