SYSTEMD-FSCK@.SERVICE(8) systemd-fsck@.service SYSTEMD-FSCK@.SERVICE(8)
NAME
systemd-fsck@.service, systemd-fsck-root.service, systemd-fsck-
usr.service, systemd-fsck - File system checker logic
SYNOPSIS
systemd-fsck@.service
systemd-fsck-root.service
systemd-fsck-usr.service
/usr/lib/systemd/systemd-fsck
DESCRIPTION
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(8) returns either the "System
should reboot" or the "Filesystem errors left uncorrected" condition.
For filesystems listed in /etc/fstab without "nofail" or "noauto"
options, local-fs.target will then activate emergency.target.
KERNEL COMMAND LINE
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
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)
systemd 257.9 SYSTEMD-FSCK@.SERVICE(8)
Generated by dwww version 1.16 on Tue Dec 16 06:56:58 CET 2025.