Last Updated: 2021-05-16
exec enters a container already running. Therefore it has to take a container ID as an argument:
docker exec -it 93d16d2f2011 bash
What's more, it does not take volume params (since that only matters when first getting that container up-and-runnning)
run spins up a new container. It therefore takes the image name and volume params.
docker run -it -v $PWD:/home/jack fastdotai/fastai-dev bash
Think "run" as in "run away" as in transient