1echo Error >/does/not/exist; echo One:$? 2t=BAD 3t=Ok >>/cant/be/created; echo One:$? 4echo $t 5! >/cant/be/created; echo Zero:$? 6exec >/cant/be/created; echo One:$? 7exec /bin/true >/cant/be/created; echo One:$? 8! exec /bin/true >/cant/be/created; echo Zero:$? 9echo Done 10