This script is used to grab images from a slide share containing the Modern Biology textbook.

grab.sh

#!/bin/bash
for i in {1..1154}
do
  wget "https://image.slidesharecdn.com/studentedition-130307085310-phpapp01/95/biology-text-book-$i-638.jpg" -O "$i.jpg" &
  while (( $(jobs | wc -l) >= 10 )); do
    sleep 0.1
    jobs > /dev/null
  done
done