Disclaimer: The tool was not developed with the intention to abuse any services from Pastebeen.com. The website is a great resource and I encourage you to support it.
Bash script for scraping, parsing and retrieving data from Pastebin/Gist using Pastebeen
./pastebino.sh <Pastebeen results URL> <email> <password> <destination folder [optional]>
./tasker.sh <start date> <end date> <regex> <email> <password>