Docker Ubuntu 16.04 Installation
The tutorial shows you step-by-step the Docker Ubuntu 16.04 Installation for 64-bit GNU/Linux Systems.
First, this is the Docker CE Installation Guide for Ubuntu 16.04 Xenial LTS GNU/Linux Systems.
Beacause Docker is a Command-line Program, a background Daemon, and a set of Remote Services that take a Logistical Approach to Solving common Software Problems and Simplifying your experience Installing, Running, Publishing, and Removing Software.
Finally, Getting Started with Docker on Ubuntu is Easy. It’s enough to Install and Run the Docker Engine to Create and Manage Containers.

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Open a Shell session
Ctrl+Alt+t to open a Terminal emulator on desktop
(Press “Enter” to Execute Commands) -
Login as SuperUser
The default Docker Administration Requires this Privileges..sudo su
Then to Achieve this Session:
exit
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Check if a Previous Docker Version is Installed
With:which docker
If Yes then Remove that with:
apt remove docker docker-engine
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Install PreRequisite Packages.
/napt install apt-transport-https ca-certificates software-properties-common
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How to Setup the Docker CE Apt Repository
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Installing Docker CE.
sudo apt install docker-ce
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Testing Docker Installation.
With:
sudo docker run hello-world
Or:
docker run hello-world
Then Docker will Pull the Repo and Greets you with:
Hello from Docker! :) -
How to Quick Start with Docker and Docker Containers