USB to Parallel IEEE 1284 Adapter B000BV8604
http://www.amazon.com/CNE35805-Parallel-Printer-Adapter-Cable/dp/B000BV8604
sudo chmod 666 /dev/usblp0
echo "hello" > /dev/usb/lp0
cat /home/user/file > /dev/usb/lp0
http://superuser.com/questions/573539/lpt-printer-indents-text-when-printed