In provide assurance To check that you haven't made mistakes, or to perform constructive feedback to indicate a mistake<br> and suggest how to correct (fix) so you won't encounter problems in the mistake, next section a '''shell script''' has been created to check your work. If the checking shell script detects an error, then it will provide feedback and offer constructive feedback on how to fix that problem so you can re-run the checking shell scripts until your work is correct.