Assume the script below is stored as a text file

SF$.$sh :

#$!/$bin$/$bash

while getopts $"$:cf$"$ options;

do

case $options in

c$)$

clear

;

f$)$

Is $-1$

;

$*)$

echo "Invalid command line argument:

$-$$OPTARG $"$

;

esac

done

What does the command $"./$SF$.$sh $-$cd$"$do$?$