@Wayne-Workman said in Bootable USB drive to re-image a machine:
Conezilla is better suited for what you’re wanting - it already can do imaging from a local flash drive.
I agree here, you would be better served by tweaking the clonezilla code to make it a bit more automated and friendly by a nice menu program and to make it use the usb stick directly as a stroage device. In this situation you would only want a deploy option for out in the field.