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.