tldr/pages/linux/debugfs.md

debugfs

An interactive ext2/ext3/ext4 filesystem debugger.

• 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