How To Install Docker On Ubuntu | Setup Docker | Tutorial

In this video we will see how to install Docker Community Edition (CE) on Ubuntu machine. This tutorial is aimed at the audience who are new to DevOps and want to install Docker on ubuntu.

Before attempting to install Docker from binaries, be sure your host machine meets the prerequisites:

A 64-bit installation
Version 3.10 or higher of the Linux kernel. The latest version of the kernel available for your platform is recommended.
iptables version 1.4 or higher
git version 1.7 or higher
A ps executable, usually provided by procps or a similar package.
XZ Utils 4.9 or higher
A properly mounted cgroupfs hierarchy; a single, all-encompassing cgroup mount point is not sufficient. See Github issues #2683, #3485, #4568).

Steps:
SET UP THE REPOSITORY
1. Update the apt package index and install packages to allow apt to use a repository over HTTPS:
$ sudo apt-get update
$ sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

2. Add Docker’s official GPG key:
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

3. Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.
$ sudo apt-key fingerprint 0EBFCD88
pub rsa4096 2017-02-22 [SCEA] 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88

4. Use the following command to set up the stable repository.
Note: The lsb_release -cs sub-command below returns the name of your Ubuntu distribution, such as xenial. Sometimes, in a distribution like Linux Mint, you might need to change $(lsb_release -cs) to your parent Ubuntu distribution. For example, if you are using Linux Mint Tessa, you could use bionic. Docker does not offer any guarantees on untested and unsupported Ubuntu distributions.

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

5. Install Docker Engine
Update the apt package index, and install the latest version of Docker Engine and containerd, or go to the next step to install a specific version:
$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

6. Check if Docker service is running
$ sudo service docker status.