e2undo:tldr:96f87

The command you provided, "e2undo -h ${path-to-undo_file} ${-dev-sdXN}", is likely used for performing a filesystem undo operation on a specific device or partition.

Here is a breakdown of the command:

• "e2undo": This is the name of the command or utility that is being executed. It might be a custom script or a program specific to your system.
• "-h": This option is used to provide additional help or usage information about the "e2undo" command. Running the command with this option will display the available command-line options and their descriptions.
• "${path-to-undo_file}": This is an argument that should be replaced with the actual path to the undo file you want to use. It specifies the location of the undo file, which is a file that contains the changes made to the filesystem that you want to undo.
• "${-dev-sdXN}": This is another argument that should be replaced with the relevant device identifier. It specifies the device or partition on which the undo operation should be performed. The "sdXN" indicates a specific device (X) and partition number (N) in the SCSI disk naming scheme.

Without more information about the command and the purpose of the undo operation, it is difficult to provide a more precise explanation. Additionally, make sure to replace the placeholder values (e.g., "${path-to-undo_file}", "${-dev-sdXN}") with the actual paths and device identifiers specific to your system before executing the command.