Install Docker on Ubuntu 14.04

install-docker-ubuntu1404.sh

sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee /etc/apt/sources.list.d/docker.list
sudo apt-get update
sudo apt-get install docker-engine

# Set permissions. Restart is required.
sudo usermod -aG docker $USER

# Docker version/info
docker -v
docker info

# Hello world
docker run hello-world

# Extract hello-world image contents to a directory
docker save hello-world > hello-world.tar
mkdir hello-world
tar -xvf hello-world.tar -C hello-world

# List Docker images
docker image ls

# List Docker containers (running, all, all in quiet mode)
docker container ls
docker container ls --all

# Build and run
docker build --tag=alpine .
docker run -it --rm alpine

# Images
docker images -a
docker images -f dangling=true

# Containers
docker ps -a
docker ps -a -f status=exited

# Volumes
docker volume ls
docker volume ls -f dangling=true

# Prune everything
docker system prune
docker system prune -a