Crappy Internet connection downloads

export ec=18; while [ $ec -eq 18 ]; do /usr/bin/curl -O -C - "http://www.example.com/a-big-archive.zip"; export ec=$?; done

from http://ilovesymposia.com/2013/04/11/automatically-resume-interrupted-downloads-in-osx-with-curl/

sync download upload