Interacting with Docker containers

• Running an interactive shell on the container:
  

  
  # Your container may have /bin/sh instead
  docker exec -t -i [container] /bin/bash
  

  
  
• Running a command on an image instead (i.e not a running instance):
  

  
  docker run -t -i [image] /bin/bash
  

  
  
• Get the output of a running container (for logs etc):
  

  
  docker attach --no-stdin [container]

Cleaning docker

You can use the following bash script to clean out your docker instance:

#!/bin/bash
echo "docker-clean.sh [container|image|volume|cache|data|debugbar]"
if [ "$1" == "container" ]; then
    #Cleaning containers
    docker ps --no-trunc -aqf "status=exited" | xargs docker rm
elif [ "$1" == "image" ]; then
    #Cleaning images
    docker images --no-trunc -aqf "dangling=true" | xargs docker rmi
elif [ "$1" == "volume" ]; then
    #Cleaning volumes
    docker volume ls -qf "dangling=true" | xargs docker volume rm
fi