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debugfs

An interactive ext2/ext3/ext4 filesystem debugger.

More information.

Open the filesystem in read only mode:

debugfs {/dev/sdXN}

Open the filesystem in read write mode:

debugfs -w {/dev/sdXN}

Read commands from a specified file, execute them and then exit:

debugfs -f {path/to/cmd_file} {/dev/sdXN}

View the filesystem stats in debugfs console:

stats

Close the filesystem:

close -a

List all available commands:

lr

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