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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.


  

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