It takes time to notice that if you do _several_ of these background jobs with `&`, you will only get the exit status of the last one when you do `wait`. Errors

It takes time to notice that if you do _several_ of these background jobs with `&`, you will only get the exit status of the last one when you do `wait`. Errors of the others will be swallowed. Then you _have_ resort to 'wait <pid>' with the 20 lines of bash coded need to manage all those PIDs. I have a large editor bash snippet just for that.