To bash into a running container, type this:

docker exec -t -i container_name /bin/bash

or

docker exec -ti container_name /bin/bash

or

docker exec -ti container_name sh

Ví dụ gọi python trong docker

docker exec -it tyoutube python

https://stackoverflow.com/questions/30172605/how-do-i-get-into-a-docker-containers-shell