Parallel curl version

parallel.sh

#!/bin/bash
 
url=$1
file_size=`curl -sI "$1" | grep "Content-Length" | head -n 1 | cut -d ':' -f 2 | cut  -d " " -f 2 | sed "s|\r||g"`
length_of_each_part=`echo $((file_size/10))`
start=0
end=$length_of_each_part
 
for i in {1..10}
do
    curl -s --range $start-$end -o /tmp/movie.part."$i" "$url" &
    start=$((end+1))
    end=$((end+length_of_each_part))
done