Connect to docker container as user other than root

Question

BY default when you run

docker run -it [myimage]

OR

docker attach [mycontainer]

you connect to the terminal as r

Answer 1

As an updated answer from 2020. --user , -u option is Username or UID (format: [:]).

Then, it works for me like this,

docker exec -it -u root:root container /bin/bash

Reference: https://docs.docker.com/engine/reference/commandline/exec/