Copyright (c) 1996 Christos Zoulas. All rights reserved.
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.Dd September 23, 1996 .Dt FSCK 8 .Os NetBSD 1 .Sh NAME .Nm fsck .Nd file system consistency check and interactive repair .Sh SYNOPSIS .Nm fsck .Op Fl dvplfyn .Op Fl l Ar maxparallel .Op Fl t Ar fstype .Op Fl T Ar fstype:fsoptions .Op special | node ... .Sh DESCRIPTION The .Nm fsck command invokes filesystem-specific programs to check the the special devices listed in the .Xr fstab 5 file or in the command line for consistency.
p It is normally used in the script
a /etc/rc during automatic reboot. If no filesystems are specified, and ``preen'' mode is enabled ( .Fl p option) .Nm fsck reads the table
a /etc/fstab to determine which filesystems to check. Only partitions in fstab that are mounted ``rw,'' ``rq'' or ``ro'' and that have non-zero pass number are checked. Filesystems with pass number 1 (normally just the root filesystem) are checked one at a time. When pass 1 completes, all remaining filesystems are checked, running one process per disk drive. The disk drive containing each filesystem is inferred from the longest prefix of the device name that ends in a digit; the remaining characters are assumed to be the partition designator.
p The options are as follows: l -tag -width indent t Fl d Debugging mode. Just print the commands without executing them. Available only if .Nm fsck is compiled to support it. t Fl f Force checking of filesystems, even when they are marked clean (for filesystems that support this). t Fl l Ar maxparallel Limit the number of parallel checks to the number specified in the following argument. By default, the limit is the number of disks, running one process per disk. If a smaller limit is giv- en, the disks are checked round-robin, one filesystem at a time. t Fl n Causes .Nm fsck to assume no as the answer to all operator questions, except "CONTINUE?". t Fl p Enter preen mode. t Fl t Ar fstype Invoke fsck only in the comma separated list of filesystem types. If the list starts with no then invoke fsck the the filesystem types that are not specified in the list. t Fl v Print the commands before executing them. t Fl y Causes .Nm fsck to assume yes as the answer to all operator questions. t Fl T Ar fstype:fsoptions List of comma separated file system specific options for the specified file system type, in the same format as .Xr mount 8 .Sh FILES l -tag -width /etc/fstab -compact t Pa /etc/fstab file system table .El .Sh SEE ALSO .Xr mount 8 , .Xr fstab 5 , .Xr fsck_msdos 8 , .Xr fsck_ffs 8
Indexes created Sat Oct 25 16:10:12 GMT 2025