Manual: systemd-fsck-root.service

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.

CREDENTIALS
       systemd-fsck supports the service credentials logic as implemented by
       ImportCredential=/LoadCredential=/SetCredential= (see systemd.exec(5) for details). The following credentials are
       used when passed in:

       fsck.mode, fsck.repair
	   The contents of the credentials are parsed as same as the kernel command line options with the same name. See
	   above for more details.

	   Added in version 258.

       Note that by default the systemd-fsck@.service, systemd-fsck-root.service, and systemd-fsck-usr.service unit files
       are set up to inherit both fsck.mode and fsck.repair credentials from the service manager.

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 259.5											    SYSTEMD-FSCK@.SERVICE(8)