How to Install Docker on Ubuntu 14.04 LTS

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Introduction

Docker is a container-based software framework for automating deployment of applications. “Containers” are encapsulated, lightweight, and portable application modules.

Pre-Flight Check

  • These instructions are intended for installing Docker.
  • I’ll be working from a Liquid Web Core Managed Ubuntu 14.04 LTS server, and I’ll be logged in as root.

Step 1: Installation of Docker

First, you’ll follow a simple best practice: ensuring the list of available packages is up to date before installing anything new. apt-get update Let’s install Docker by installing the docker-io package: apt-get -y install docker.io Link and fix paths with the following two commands: ln -sf /usr/bin/docker.io /usr/local/bin/docker sed -i '$acomplete -F _docker docker' /etc/bash_completion.d/docker.io Finally, and optionally, let’s configure Docker to start when the server boots: update-rc.d docker.io defaults

Step 2: Download a Docker Container

Let’s begin using Docker! Download the fedora Docker image: docker pull ubuntu

Step 3: Run a Docker Container

Now, to setup a basic ubuntu container with a bash shell, we just run one command. docker run will run a command in a new container, -i attaches stdin and stdout, -t allocates a tty, and we’re using the standard ubuntu container. docker run -i -t ubuntu /bin/bash That’s it! You’re now using a bash shell inside of a ubuntu docker container. To disconnect, or detach, from the shell without exiting use the escape sequence Ctrl-p + Ctrl-q. There are many community containers already available, which can be found through a search. In the command below I am searching for the keyword debian: docker search debian
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