Linux Command Directory


Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

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fsck

fsck [options] [filesystem] ...

System administration command. Call the filesystem checker for the appropriate system type to check and repair unmounted filesystems. If a filesystem is consistent, the number of files, number of blocks used, and number of blocks free are reported. If a filesystem is inconsistent, fsck prompts before each correction is attempted. fsck's exit code can be interpreted as the sum of all conditions that apply:

1

Errors were found and corrected.

2

Reboot suggested.

4

Errors were found but not corrected.

8

fsck encountered an operational error.

16

fsck was called incorrectly.

128

A shared library error was detected.

Options

--

Pass all subsequent options to filesystem-specific checker. All options that fsck doesn't recognize will also be passed.

-s

Serial mode. Check one filesystem at a time.

-t fstype

Specify the filesystem type. Do not check filesystems of any other type.

-A

Check all filesystems listed in /etc/fstab. The root filesystem is checked first.

-C

Display completion (progress) bar.

-N

Suppress normal execution; just display what would be done.

-P

Meaningful only with -A: check root filesystem in parallel with other systems. This option is potentially dangerous.

-R

Meaningful only with -A: check all filesystems listed in /etc/fstab except the root filesystem.

-T

Suppress printing of title.

-V

Verbose mode.


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