Install Docker on Ubuntu 16.04

Guide through installing community Docker edition, known as docker ce.

Table of Contents

Prerequisites

• 64-bit Ubuntu 16.04
• non-root user that can sudo

Install Docker

More in-depth explanation of steps available in official documentation.
If starting from clean slate, then:

Follow recommended installs

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

Add Docker GPG

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

Install Docker CE

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

Postinstall

You should see something like this when trying to list docker containers:

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.32/containers/json: dial unix /var/run/docker.sock: connect: permission denied

By default, only root users have permission to use docker. To change that, we’ll add our current user to docker group.

sudo gpasswd -a $USER docker

This step is to avoid logout/login:

sg docker -c bash

If you type docker ps, instead of error message you should see:

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES