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e2undo — Replay undo logs for an ext2/ext3/ext4 filesystem. This can be used to undo a failed operation by an

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e2undocommandclireplayforundoext2logs
linux

Problem

How to use the e2undo command: Replay undo logs for an ext2/ext3/ext4 filesystem. This can be used to undo a failed operation by an e2fsprogs program. More information: <https://manned.org/e2undo>.

Solution

e2undo — Replay undo logs for an ext2/ext3/ext4 filesystem. This can be used to undo a failed operation by an e2fsprogs program. More information: <https://manned.org/e2undo>.

Display information about a specific undo file:
e2undo -h {{path/to/undo_file}} {{/dev/sdXN}}


Perform a dry-run and display the candidate blocks for replaying:
e2undo -nv {{path/to/undo_file}} {{/dev/sdXN}}


Perform an undo operation:
e2undo {{path/to/undo_file}} {{/dev/sdXN}}


Perform an undo operation and display [v]erbose information:
e2undo -v {{path/to/undo_file}} {{/dev/sdXN}}


Write the old contents of the block to an undo file before overwriting a file system block:
e2undo -z {{path/to/file.e2undo}} {{path/to/undo_file}} {{/dev/sdXN}}

Code Snippets

Display information about a specific undo file

e2undo -h {{path/to/undo_file}} {{/dev/sdXN}}

Perform a dry-run and display the candidate blocks for replaying

e2undo -nv {{path/to/undo_file}} {{/dev/sdXN}}

Perform an undo operation

e2undo {{path/to/undo_file}} {{/dev/sdXN}}

Perform an undo operation and display [v]erbose information

e2undo -v {{path/to/undo_file}} {{/dev/sdXN}}

Write the old contents of the block to an undo file before overwriting a file system block

e2undo -z {{path/to/file.e2undo}} {{path/to/undo_file}} {{/dev/sdXN}}

Context

tldr-pages: linux/e2undo

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