70 lines
1.9 KiB
Groff
70 lines
1.9 KiB
Groff
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.TH FSCK 1
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.SH NAME
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fsck \- perform file system consistency check
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.SH SYNOPSIS
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\fBfsck\fR [\fB\-aclmrs\fR]\fR [\fIdevice\fR] ...\fR
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.br
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.de FL
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.TP
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\\fB\\$1\\fR
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\\$2
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..
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.de EX
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.TP 20
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\\fB\\$1\\fR
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# \\$2
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..
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.SH OPTIONS
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.TP 5
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.B \-a
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# Automatically repair inconsistencies
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.TP 5
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.B \-c
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# Check and list only the specified i-nodes
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.TP 5
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.B \-l
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# List the files and directories in the filesytem
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.TP 5
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.B \-r
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# Prompt user for repairs if inconsistencies are found
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.TP 5
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.B \-s
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# List the superblock of the file system
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.SH EXAMPLES
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.TP 20
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.B fsck /dev/c0d0p3
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# Check file system on \fI/dev/c0d0p3\fR
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.TP 20
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.B fsck \-a /dev/at0
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# Automatically fix errors on \fI/dev/at0\fR
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.TP 20
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.B fsck \-l /dev/fd0
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# List the contents of \fI/dev/fd0\fR
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.TP 20
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.B fsck \-c 2 3 /dev/c0d0p2
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# Check and list \fI/dev/c0d0p2\fR i-nodes 2 & 3
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.SH DESCRIPTION
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.PP
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\fIFsck\fR performs consistency checks on the file systems which reside
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on the specified devices.
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When either the \fB\-a\fR or \fB\-r\fR flags are given, the file system
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will be repaired if errors are found.
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Before running \fIfsck\fR on a mounted file system, it must first be unmounted.
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Trying to repair a mounted file system is dangerous and should not be
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attempted.
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.PP
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To repair the root file system (which cannot be unmounted), first
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type CTRL-F9 at the console to kill any and all processes. Log back in
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as \fBroot\fR, type \fIsync\fR to force any buffered changes to disk,
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run \fIfsck\fR on the root file system and immediately reboot the
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computer by typing \fIreboot\fR.
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.PP
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It is necessary to kill all processes before repairing the root file system
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to prevent them from modifying any disk blocks while \fIfsck\fR is running.
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This is only necessary for the root file system, any other file system can
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simply be unmounted before it is checked.
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.SH "SEE ALSO"
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.BR mkfs (1),
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.BR mount (1).
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.\" disk name refs corrected, i.e., old hd1 now c0d0p0 -- ASW 2005-01-15
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