fsck

Check the integrity of a filesystem or repair it. The filesystem should be unmounted at the time the command is run.

• Check filesystem /dev/sda, reporting any damaged blocks:

fsck {{/dev/sda}}

• Check filesystem /dev/sda, reporting any damaged blocks and interactively letting the user choose to repair each one:

fsck -r {{/dev/sda}}

• Check filesystem /dev/sda, reporting any damaged blocks and automatically repairing them:

fsck -a {{/dev/sda}}