bash script a partir d'un fichier variable

filename='url.txt'
n=1
rm -rf downloadURL.txt
while read line;
do
# for read each line
echo "docker exec -i StreamRip tidal-dl -l $line" >> downloadURL.txt
n=$((n+1))
done < $filename

download='downloadURL.txt'
while read line;
do
n=$((n+1))
done < $download
bash downloadURL.txt