Evilzone.org | Programming Challenge | Challenge: Unpacker

unpacker.sh

#Dowload the archive file from : https://evilzone.org/index.php?page=challenges&sub=viewChallenge&id=21 
#Run ./unpacker.sh script from the location you downloaded file.

#!/usr/bin/env bash
FILE=$(pwd)
FILE+=/flag_999.tar.gz
if test -f "$FILE"; then
    echo "File found and Procesing."
else
    echo "File $FILE does not exist."
    exit
fi
for i in {1..1000}; do
    let num=1000-$i
    tar -xvf flag_$num.tar.gz
    rm flag_$num.tar.gz
done
echo -n "YOUR FLAG IS:"
cat flag.txt