Taking screenshots from a list of files

Screenshot file

#!/bin/bash

if [ -z "$1" ]; then
  echo "Filename required."
  exit 1
fi

while read LINE; do
  URL=$(echo "$LINE" | awk '{print $1'})
  FILENAME=$(echo "$LINE" | awk '{print $2'})

  echo -n "Capturing $URL ... "
  screenshot.sh $URL $FILENAME
  echo "done."

done < "$1"