Install Docker on Ubuntu 14.04

Install Docker

Docker requires a 64-bit installation regardless of your Ubuntu version. Additionally, your kernel must be 3.10 at minimum. The latest 3.10 minor version or a newer maintained version are also acceptable.

To check your current kernel version, open a terminal and use uname -r to display your kernel version:

uname -r

Update your apt sources

Docker’s APT repository contains Docker 1.7.1 and higher. To set APT to use packages from the new repository:

sudo apt-get install apt-transport-https ca-certificates

Add the new GPG key.

$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

Apt sources

Add the line

deb https://apt.dockerproject.org/repo ubuntu-trusty main

to /etc/apt/sources.list.d/docker.list file

Prerequisites by Ubuntu Version

Install the following pre-requisites

sudo apt-get install linux-image-extra-$(uname -r)
sudo apt-get install apparmor

Install Docker

Run the below command to install docker

sudo apt-get install docker-engine

Start the docker daemon

sudo service docker start

verify the docker is installed properly

sudo docker run hello-world

Uninstallation

 sudo apt-get purge docker-engine
 sudo apt-get autoremove --purge docker-engine
 rm -rf /var/lib/docker

References

• https://docs.docker.com/engine/installation/linux/ubuntulinux/