--- a/testing3-bak/mark	Fri Nov 23 01:52:37 2018 +0000
+++ b/testing3-bak/mark	Tue Nov 27 21:41:59 2018 +0000
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 ###set -e
 
 trap "exit" INT