(Though to be honest, I'm also somewhat sceptical that a single & in Bash would be sufficient to move a bunch of files in a particular order, and restore them p

(Though to be honest, I'm also somewhat sceptical that a single & in Bash would be sufficient to move a bunch of files in a particular order, and restore them properly if the process gets terminated somewhere halfway along the process. But what I'm sure about is that I wouldn't have been able to write that in a reasonable amount of time!)