focal (8) systemd-fsck-root.service.8.gz

NAME

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

SYNOPSIS

       systemd-fsck@.service

       systemd-fsck-root.service

       /lib/systemd/systemd-fsck

DESCRIPTION

       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 rotating disk.

       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.

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.

       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.

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)