mirror of https://github.com/vitalif/e2fsprogs
153 lines
4.0 KiB
Groff
153 lines
4.0 KiB
Groff
.\" -*- nroff -*-
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.TH FSCK 8 "Mar 1994" "Version 0.5"
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.SH NAME
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fsck \- check and repair a Linux file system
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.SH SYNOPSIS
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.B fsck
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[
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.B \-A
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]
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[
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.B \-V
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]
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[
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.B \-t
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.I fstype
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]
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[
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.B fs-options
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]
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.I filesys [ ... ]
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.SH DESCRIPTION
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.B fsck
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is used to check and optionally repair a Linux file system.
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.I filesys
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is either the device name (e.g. /dev/hda1, /dev/sdb2) or the mount point
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(e.g. /, /usr, /home) for the file system. If this fsck has several
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filesystems on different physical disk drives to check, this fsck will
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try to run them in parallel. This reduces the total amount time it
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takes to check all of the filesystems, since fsck takes advantage of the
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parallelism of multiple disk spindles.
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.PP
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The exit code returned by
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.B fsck
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is the sum of the following conditions:
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.br
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\ 0\ \-\ No errors
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.br
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\ 1\ \-\ File system errors corrected
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.br
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\ 2\ \-\ System should be rebooted
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.br
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\ 4\ \-\ File system errors left uncorrected
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.br
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\ 8\ \-\ Operational error
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.br
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\ 16\ \-\ Usage or syntax error
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.br
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\ 128\ \-\ Shared library error
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.br
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The exit code returned when all file systems are checked using the
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.B -A
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option is the bit-wise OR of the exit codes for each
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file system that is checked.
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.PP
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In actuality,
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.B fsck
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is simply a front-end for the various file system checkers
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(\fBfsck\fR.\fIfstype\fR) available under Linux. The file
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system-specific checker is searched for in /sbin first, then in /etc/fs
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and /etc, and finally in the directories listed in the PATH environment
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variable. Please see the file system-specific checker manual pages for
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further details.
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.SH OPTIONS
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.TP
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.B -A
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Walk through the
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.I /etc/fstab
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file and try to check all file systems in one run. This option is
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typically used from the
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.I /etc/rc
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system initalization file, instead of multiple commands for checking
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a single file system. Note, that with this option, you cannot give
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the
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.I filesys
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argument as well.
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.TP
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.B -s
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Serialize fsck operations. This is a good idea if you checking multiple
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filesystems in and the checkers are in an interactive mode. (Note:
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.B e2fsck
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runs in an interactive mode by default. To make
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.B e2fsck
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run in a non-interactive mode, you must either specify the
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.B -p
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or
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.B -a
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option, if you wish for errors to be corrected automatically, or
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the
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.B -n
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option if you do not.)
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.TP
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.B -V
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Produce verbose output, including all file system-specific commands
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that are executed.
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Specifying this option more than once inhibits execution of any
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file system-specific commands.
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This is really only useful for testing.
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.TP
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.BI -t \ fstype
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Specifies the type of file system to be checked.
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If not specified, the type is deduced by searching for
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.I filesys
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in
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.I /etc/fstab
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and using the corresponding entry.
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If the type can not be deduced, the default file system type
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(currently ext2) is used.
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.TP
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.B fs-options
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Any options which are not understood by
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.BR fsck ,
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or which follow the
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.B --
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option are treated as file system-specific options to be passed to the
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realm file system checker.
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.PP
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Currently, standardized file system-specific options are somewhat in
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flux. Although not guaranteed, the following options are supported
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by most file system checkers.
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.TP
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.B -a
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Automatically repair the file system without any questions (use
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this option with caution). Note that
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.B e2fsck
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supports
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.B -a
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for backwards compatibility only. This option is mapped to e2fsck's
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.B -p
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option which is safe to use, unlike the
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.B -a
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option that most file system checkers support.
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.TP
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.B -r
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Interactively repair the filesystem (ask for confirmations). Note: It
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is generally a bad idea to use this option if multiple fsck's are being
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run in parallel. Also note that this is
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.B e2fsck
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default behavior; it supports this option for backwards compatibility
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reasons only.
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.SH AUTHOR
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Theodore Ts'o (tytso@mit.edu)
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.PP
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The manual page was shamelessly adapted from David Engel and Fred van
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Kempen's generic fsck front end program, which was in turn shamelessly
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adapted from Remy Card's version for the ext2 file system.
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.SH SEE ALSO
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.BR mkfs (8),
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.BR fsck.minix (8),
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.BR fsck.ext2 (8)
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or
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.BR e2fsck (8),
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.BR fsck.xiafs (8).
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