e2undo:tldr:2a95b

e2undo: Perform an undo operation.

e2undo

$ e2undo ${path-to-undo_file} ${-dev-sdXN}

try on your machine

The command "e2undo" is used to undo changes made to an ext2, ext3, or ext4 filesystem. It restores the filesystem to a previous state by applying an undo file that contains the necessary changes.

Here is the breakdown of the command:

"e2undo": This is the command itself that is used to invoke the e2undo tool.
"${path-to-undo_file}": This is the path to the undo file that contains the changes to be undone. The actual path to the undo file needs to be provided here.
"${-dev-sdXN}": This part specifies the filesystem device (partition) to which the undo operation should be applied. The "-dev-sdXN" is a placeholder, and you need to replace it with the actual device identifier of the filesystem you want to undo changes on. The "sdXN" represents the device name, where "sd" refers to a storage device, "X" refers to a specific device (e.g., "a" for the first device), and "N" represents the partition number within the device.

For example, if you want to undo changes on the first partition of the second storage device, you would replace "${-dev-sdXN}" with "/dev/sdb1".

Note: Be cautious while using the e2undo command as it modifies the filesystem. Make sure to back up important data before applying any undo operations.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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