11-28-2018
The first line of your script should be the #!/bin/bash; not the 2nd line. Since the 1st line of your script does not start with #!, the second line of your script is just a comment and has no effect on the program used to interpret your script.
The diagnostic you're seeing is from the echo. You don't have permission to overwrite your script with the echo since the echo is not running as the root user.
And, of course, giving a non-root user permission to overwrite a set-uid root script, allows any user on that system with that permission to do absolutely anything that user wants to do to that system. Please, never do this!
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