Ubuntu 16.04 - Install Docker

Install Using PPA

Using a PPA will allow you to always use the latest version of Docker without waiting on the Ubuntu package maintainers. Normally I would recommend installing from the Ubuntu Repos, but with docker this method is what I recommend.

Docker will not start correctly if you are running a VPN connection. This will make it appear like installation failed when actually installation succeeded but docker will fail to start up correctly.

Method 1

#!/bin/bash

# Stop script on any error
set -e

# Remove any existing installations...
sudo apt-get purge docker-engine -y
sudo apt-get remove docker docker-engine docker.io -y

sudo apt update 
sudo apt install -y \
software-properties-common apt-transport-https ca-certificates curl

# Add the key for docker
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"

sudo apt update
sudo apt install docker-ce -y

# Add the current user to docker so that you can
# execute docker commands without using sudo
sudo usermod -aG docker $USER

echo "You will need to reboot before using docker."

I recommend checking and ensuring the storage driver is set to overlay2.

(Method 2)

This method is what I had been using for quite some time now and still works but the documentation now shows the method above.

Run the command below to install Docker through prog-exec.

prog-exec "7" "8260fb8f1d266abb3275b651e8e24f611751803046c1c9cd1741f98580f907ff"

... or you can execute the following script:

#!/bin/bash
sudo apt update -y
sudo apt install apt-transport-https ca-certificates -y

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

echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" \
| sudo tee /etc/apt/sources.list.d/docker.list


sudo apt update
sudo apt-get purge lxc-docker

sudo apt install -y docker-engine

# Add the current user to docker so that you can
# execute docker commands without using sudo
sudo usermod -aG docker $USER

echo "You will need to reboot before using docker."

Uninstall

If you wish to uninstall docker after having installed it using this method, use the commands below:

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

Removing /var/lib/docker will remove all images, containers, and volumes, so move any data you want to keep before doing this!

Install From Ubuntu Repos

sudo apt update && sudo apt install docker.io -y

# Add our current user to the docker group so they can execute docker commands.
sudo usermod -a -G docker $USER

This will install version 1.10.3 at the time of writing this tutorial.

References

• Docker Installation Docs - Ubuntu
• DigitalOcean - How To Install and Use Docker on Ubuntu 16.04
• How to completely uninstall docker from ubuntu