tldr/pages/linux/debugfs.md

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debugfs

An interactive ext2/ext3/ext4 filesystem debugger. More information: https://manned.org/debugfs.

  • 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