Section: System Administration (8)
Updated: June 2015
fsck.minix - check consistency of Minix filesystem
performs a consistency check for the Linux MINIX filesystem.
The program assumes the filesystem is quiescent.
should not be used on a mounted device unless you can be sure nobody is
writing to it. Remember that the kernel can write to device when it
searches for files.
The device name will usually have the following form:
|/dev/hda[1-63]||IDE disk 1|
|/dev/hdb[1-63]||IDE disk 2|
|/dev/sda[1-15]||SCSI disk 1|
|/dev/sdb[1-15]||SCSI disk 2|
If the filesystem was changed, i.e., repaired, then
will print "FILE SYSTEM HAS CHANGED" and will
three times before exiting. There is
need to reboot after check.
be used on a mounted filesystem. Using
on a mounted filesystem is very dangerous, due to the possibility that
deleted files are still in use, and can seriously damage a perfectly good
filesystem! If you absolutely have to run
on a mounted filesystem, such as the root filesystem, make sure nothing
is writing to the disk, and that no files are "zombies" waiting for
- -l, --list
List all filenames.
- -r, --repair
Perform interactive repairs.
- -a, --auto
Perform automatic repairs. This option implies
and serves to answer all of the questions asked with the default. Note
that this can be extremely dangerous in the case of extensive filesystem
- -v, --verbose
- -s, --super
Output super-block information.
- -m, --uncleared
Activate MINIX-like "mode not cleared" warnings.
- -f, --force
Force a filesystem check even if the filesystem was marked as valid.
Marking is done by the kernel when the filesystem is unmounted.
- -V, --version
Display version information and exit.
- -h, --help
Display help text and exit.
There are numerous diagnostic messages. The ones mentioned here are the
most commonly seen in normal usage.
If the device does not exist,
will print "unable to read super block". If the device exists, but is not
a MINIX filesystem,
will print "bad magic number in super-block".
The exit code returned by
is the sum of the following:
Filesystem errors corrected, system should be rebooted if filesystem was
Filesystem errors left uncorrected
Combination of exit codes 3 and 4
Usage or syntax error
Error code values by
Added support for filesystem valid flag:
Check to prevent fsck of mounted filesystem added by
Minix v2 fs support by
Portability patch by
The fsck.minix command is part of the util-linux package and is available from
Linux Kernel Archive