List filesystem checkers available to fsck
Build a paste-ready command, then review its compatibility and effects before running it.
read-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-20
Requirementsfsckfsck must be installed and available on PATH.
Version supportfsck Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signalsfsck from util-linux 2.41Representative successful output; values vary with the selected target and system state.
Known errorsfsck: command not foundfsck is missing or is not available on PATH.
Verifyfsck -NThe output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01fsckCommandRuns the fsck stage of this one-liner.
02-NOptionConfigures fsck with the -N option.
Example output
fsck from util-linux 2.41
[/usr/sbin/fsck.ext4 (1) -- /dev/sda2] fsck.ext4 /dev/sda2
Illustrative output — exact values vary by system and data.
Official sources