Section: System Administration (8)
Updated: July 1996
fsck.minix performs a consistency check for the Linux MINIX filesystem. The current version supports the 14 character and 30 character filename options.
The program assumes the filesystem is quiescent. fsck.minix should not be used on a mounted device unless you can be sure nobody is writing to it (and remember that the kernel can write to it 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 fsck.minix will print "FILE SYSTEM HAS CHANGED" and will sync?(2) three times before exiting. Since Linux does not currently have raw devices, there is no need to reboot at this time.
fsck.minix should not be used on a mounted filesystem. Using fsck.minix 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 fsck.minix on a mounted filesystem (i.e., the root filesystem), make sure nothing is writing to the disk, and that no files are "zombies" waiting for deletion.
- List all filenames.:
- Perform interactive repairs.:
- Perform automatic repairs. (This option implies -r 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 damage.:
- Be verbose.:
- Output super-block information.:
- Activate MINIX-like "mode not cleared" warnings.:
- Force a filesystem check even if the filesystem was marked as valid (this marking is done by the kernel when the filesystem is unmounted).:
There are numerous diagnostic messages. The ones mentioned here are the most commonly seen in normal usage.
The exit code returned by fsck.minix is the sum of the following:
- No errors:
- Filesystem errors corrected, system should be rebooted if filesystem was mounted:
- Filesystem errors left uncorrected:
- Combination of exit codes 3 and 4:
- Operational error:
- Usage or syntax error:
Linus Torvalds ([email protected])
Error code values by Rik Faith ([email protected])
Added support for filesystem valid flag: Dr. Wettstein ([email protected])
Check to prevent fsck of mounted filesystem added by Daniel Quinlan ([email protected])
Portability patch by Russell King ([email protected]).
The fsck.minix command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.