man7.org > Linux > man-pages

Linux/UNIX system programming training

systemd-fsck@.service(8) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | KERNEL COMMAND LINE | SEE ALSO | COLOPHON 

SYSTEMD-FSCK@.SERVICE(8)  systemd-fsck@.service  SYSTEMD-FSCK@.SERVICE(8)

NAME         top

       systemd-fsck@.service, systemd-fsck-root.service, systemd-fsck-
       usr.service, systemd-fsck - File system checker logic

SYNOPSIS         top

           systemd-fsck@.service
           systemd-fsck-root.service
           systemd-fsck-usr.service
           /usr/lib/systemd/systemd-fsck

DESCRIPTION         top

       systemd-fsck@.service, systemd-fsck-root.service, and
       systemd-fsck-usr.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 and
       systemd-fsck-usr.service are responsible for file system checks on
       the root and /usr file system, respectively, but only if the root
       filesystem was not checked in the initrd.  systemd-fsck@.service
       is used for all other file systems and for the root file system in
       the initrd.

       These services are started at boot if passno in /etc/fstab for the
       file system is set to a value greater than zero, but only if it is
       also configured to be mounted at boot (i.e. without "noauto"
       option). 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 rotating disk.

       systemd-fsck does not know any details about specific filesystems,
       and simply executes file system checkers specific to each
       filesystem type (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.

       systemd-fsck-root.service and systemd-fsck-usr.service will
       activate reboot.target if fsck(8) returns the "System should
       reboot" condition, or emergency.target if fsck returns the
       "Filesystem errors left uncorrected" condition.

       systemd-fsck@.service will fail if fsck returns with either
       "System should reboot" or "Filesystem errors left uncorrected"
       conditions. For filesystems listed in /etc/fstab without "nofail"
       or "noauto" options, "local-fs.target" will then activate
       emergency.target.

KERNEL COMMAND LINE         top

       systemd-fsck understands these kernel command line parameters:

       fsck.mode=
           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.

           Added in version 186.

       fsck.repair=
           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.

           Added in version 213.

SEE ALSO         top

       systemd(1), fsck(8), systemd-quotacheck.service(8), fsck.btrfs(8),
       fsck.cramfs(8), fsck.ext4(8), fsck.fat(8), fsck.hfsplus(8),
       fsck.minix(8), fsck.ntfs(8), fsck.xfs(8)

COLOPHON         top

       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
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2025-02-02.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2025-02-02.)  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
       man-pages@man7.org

systemd 258~devel                                SYSTEMD-FSCK@.SERVICE(8)

Pages that refer to this page: kernel-command-line(7),  systemd.directives(7),  systemd.index(7),  systemd-quotacheck.service(8)

HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface.

For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Hosting by jambit GmbH.

Cover of TLPI