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.TH "SYSTEMD\-FSCK@\&.SERVICE" "8" "" "systemd 259.7" "systemd-fsck@.service"
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.SH "NAME"
systemd-fsck@.service, systemd-fsck-root.service, systemd-fsck-usr.service, systemd-fsck \- File system checker logic
.SH "SYNOPSIS"
.PP
.RS 4
systemd\-fsck@\&.service
.RE
.RS 4
systemd\-fsck\-root\&.service
.RE
.RS 4
systemd\-fsck\-usr\&.service
.RE
.RS 4
/usr/lib/systemd/systemd\-fsck
.RE
.SH "DESCRIPTION"
.PP
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\&.
.PP
These services are started at boot if
\fBpassno\fR
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\&.
.PP
systemd\-fsck
does not know any details about specific filesystems, and simply executes file system checkers specific to each filesystem type (fsck\&.\fItype\fR)\&. These checkers will decide if the filesystem should actually be checked based on the time since last check, number of mounts, unclean unmount, etc\&.
.PP
systemd\-fsck\-root\&.service
and
systemd\-fsck\-usr\&.service
will activate
reboot\&.target
if
\fBfsck\fR(8)
returns the "System should reboot" condition, or
emergency\&.target
if
\fBfsck\fR
returns the "Filesystem errors left uncorrected" condition\&.
.PP
systemd\-fsck@\&.service
will fail if
\fBfsck\fR(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\&.
.SH "KERNEL COMMAND LINE"
.PP
\fBsystemd\-fsck\fR
understands these kernel command line parameters:
.PP
\fIfsck\&.mode=\fR
.RS 4
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\&.
.sp
Added in version 186\&.
.RE
.PP
\fIfsck\&.repair=\fR
.RS 4
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\&.
.sp
Added in version 213\&.
.RE
.SH "CREDENTIALS"
.PP
\fBsystemd\-fsck\fR
supports the service credentials logic as implemented by
\fIImportCredential=\fR/\fILoadCredential=\fR/\fISetCredential=\fR
(see
\fBsystemd.exec\fR(5)
for details)\&. The following credentials are used when passed in:
.PP
\fIfsck\&.mode\fR, \fIfsck\&.repair\fR
.RS 4
The contents of the credentials are parsed as same as the kernel command line options with the same name\&. See above for more details\&.
.sp
Added in version 258\&.
.RE
.PP
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
\fIfsck\&.mode\fR
and
\fIfsck\&.repair\fR
credentials from the service manager\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1), \fBfsck\fR(8), \fBsystemd-quotacheck@.service\fR(8), \fBfsck.btrfs\fR(8), \fBfsck.cramfs\fR(8), \fBfsck.ext4\fR(8), \fBfsck.fat\fR(8), \fBfsck.hfsplus\fR(8), \fBfsck.minix\fR(8), \fBfsck.ntfs\fR(8), \fBfsck.xfs\fR(8)
