Docker Cookbook

1.1 Installing Docker on Ubuntu 14.04
Problem
You want to use Docker on Ubuntu 14.04.
Solution
On Ubuntu 14.04, installing Docker is achieved in three lines of bash commands at
most. The recommended installation by the Docker project uses a bash script that is
available on the Internet. Be careful, because a preexisting 
docker
package is included
in the Ubuntu repositories that is not related to 
Docker
. Perform the recommended
installation:
$ sudo apt-get update
$ sudo apt-get install -y wget
$ sudo wget -qO- https://get.docker.com/ | sh
You can test that the installation worked fine by checking the version of Docker:
2 | Chapter 1: Getting Started with Docker

---

$ sudo docker --version
Docker version 1.7.1, build 786b29d
You can stop, start, and restart the service. For example, to restart it:
$ sudo service docker restart
If you want to use 
docker
from a nonroot user, add the user
account to the 
docker
group:
$ sudo gpasswd -a docker
Exit the current shell and log in again or start a new shell for the
change to take effect.
Discussion
You can look at the installation script available at 
https://get.docker.com
to perform the
installation step by step and customize it to your liking. On Ubuntu 14.04 (
trusty
release), at a minimum you would do the following:
$ sudo apt-get update
$ sudo apt-get install -y linux-image-extra-$(uname -r) linux-image-extra-virtual
$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80
--recv-keys 58118E89F3A912897C070ADBF76221572C52609D
$ sudo su
# echo deb https://apt.dockerproject.org/repo ubuntu-trusty main > \
/etc/apt/sources.list.d/docker.list
# apt-get -y install docker-engine
See Also
• For installation of Docker on other operating systems, see the official installation
documentation
.