Problem
1. Devise a script that allows a user to view, add, delete, or modify a setting in a configuration file that contains settings in the form variable=value.
2. Write a script that compares two directories bar1 and bar2 (supplied as arguments) and copies or overwrites to bar1 from bar2 every file that is
(i) not present in bar1,
(ii) newer than its namesake in bar1.