Today Docker Version 1.3 is was released and is available in repositories.

It introduces the new command exec. It makes tools like nsinit and nsenter obsolete. Entering running container becomes possible with Docker itself and i like this very, very much. Docker’s exec command allows executing additional process within the container, e.g.

docker exec myContainer -it bash

The example above attaches to the running container “myContainer”. Another new interesting command is docker create

docker create 
#creates container out of image like docker run, but without running it. So
docker run some/image

it is the same like

$CONTAINER_ID=$(docker create -t -i ubuntu bash)
docker start -a -i $CONTAINER_ID

Have fun!

P.S. my Docker

    docker info
     Execution Driver: native-0.2
    Kernel Version: 3.1.0-1-amd64
    Operating System: Debian GNU/Linux 7 (wheezy)