Switch GPU to CPU using the aws-cli

It is a well known fact that machine learning (and #deep-learning in particular) needs lots of compute power. If conditions are right (i.e. enough data is involved) a GPU enabled machine might be needed to speed up training (and thus have a faster iteration cycle). Having a GPU though is quite expensive nowadays so most researchers use one through cloud offerings (like AWS, Azure or Google Cloud). In general, this is cheaper than buying and setting up your own dedicated machi