Reference: https://psiturk.readthedocs.io/en/latest/amazon_ec2.html
Installing psiturk: Installing Python2 - sudo apt install python2.7 python-pip Trying sudo pip2 install psiturk ; if fails on cryptography you need: sudo pip install setuptools --upgrade (Ref: https://stackoverflow.com/questions/22073516/failed-to-install-python-cryptography-package-with-pip-and-setup-py)
Added psiturk keys: scp ~/.psiturkconfig
Handy dandy: ps aux | grep psiturk | awk '{print $2}' | xargs kill -9 -- on mac