Program BASH "COPY PASTE" file LINUX

#!/bin/bash

# loop tentang menimpa file "Copy Paste file"

while [ $# -ne 2 ]; do

        echo "copas.sh error :number of input is not valid. It supposed be two inputs, origin file and destination file address separated by space";

        exit 1;

done

while [ -d $1 ];  do

        echo "copas.sh error:directory is not permitted";

        exit 1;

done

while [ ! -f $1 ]; do

        echo "copas.sh error:no origin file address provided";

        exit 1;

--AGINTA--

done

while [ -f $2 ]; do

        echo "are you sure you want to override this file";

        read jawab;

        case $jawab in

                    "y" | "Y" )

                                cp $1 $2;

                                echo "copas.sh berhasil";

                                exit 0;;

                    "n" | "N" )

                                echo "copas.sh cancelled by user";

                                exit 1;;

                    * )

                                echo "copas.sh error:invalid answer";

                                exit 1;;

        esac

done

cp $1 $2;

echo "copas.sh berhasil";