FSCK(8)                                                             System Administration                                                             FSCK(8)

NAME
       fsck - check and repair a Linux filesystem

SYNOPSIS
       fsck [-lsAVRTMNP] [-r [fd]] [-C [fd]] [-t fstype] [filesystem...] [--] [fs-specific-options]

DESCRIPTION
       fsck  is  used to check and optionally repair one or more Linux filesystems.  filesys can be a device name (e.g.  /dev/hdc1, /dev/sdb2), a mount point
       (e.g.  /, /usr, /home), or an filesystem label or UUID specifier (e.g.  UUID=8868abf6-88c5-4a83-98b8-bfc24057f7bd or LABEL=root).  Normally, the  fsck
       program will try to handle filesystems on different physical disk drives in parallel to reduce the total amount of time needed to check all of them.

       If no filesystems are specified on the command line, and the -A option is not specified, fsck will default to checking filesystems in /etc/fstab seri‐
       ally.  This is equivalent to the -As options.

       The exit code returned by fsck is the sum of the following conditions:

              0      No errors
              1      Filesystem errors corrected
              2      System should be rebooted
              4      Filesystem errors left uncorrected
              8      Operational error
              16     Usage or syntax error
              32     Checking canceled by user request
              128    Shared-library error

       The exit code returned when multiple filesystems are checked is the bit-wise OR of the exit codes for each filesystem that is checked.

       In actuality, fsck is simply a front-end for the various filesystem checkers (fsck.fstype) available under Linux.  The filesystem-specific checker  is
       searched for in the PATH environment variable. If the PATH is undefined then fallback to "/sbin".

       Please see the filesystem-specific checker manual pages for further details.

"Filesystem Check" is inspired by Linux systems, with the name derived from the `fsck` command. Documentation and details are sourced from the man page (`man fsck`).

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