Detaching and Attaching
Start a container with a command like this one:
$ docker conatiner run --name c1 -it alpine:latest sh
c1 is the name given to the new container and
alpine:latest is the name and tag of the image you wish to use. You should see
/ # at the prompt, indicating that you are attached to the container.
-it allows you to easily detach the container later by pressing
ctrl+p+ctrl+q. If you instead use
-itd the container will initialize unattached.
You can re-attach to a running container by entering
$ docker container attach [container name]