How to install Docker

What is Docker?

Docker is a tool designed to make it easier to create, deploy, and run applications by using containers.

Containers allow a developer to package up an application with all of the parts it needs, such as libraries and other dependencies, and ship it all out as one package with the full os included so everything configured works right out the box.

Getting Started with installing Docker
Windows / Mac OSX / Linux

WINDOWS AND MAC USERS INSTALL DOCKER:
Download & install on Windows or Mac

FOR LINUX USERS:
INSTALL DOCKER ON UBUNTU / DEBIAN / CENTOS

curl -fsSL https://get.docker.com/ | sh

If you receive an error about gpg keys

EXAMPLE:

GPG error: https://download.docker.com/linux/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY xxxxxxxxxxxx

RUN

chmod a+r /usr/share/keyrings/docker-archive-keyring.gpg

Then Retry to install Docker.

NOTE: For windows users Hyper-V will be enabled via the software install.
Virtualization must be enabled via BIOS for Docker Desktop to work.

Check if docker is running & its version
ON WINDOWS Open Windows Powershell 
LINUX or MAC OSX – Use your preferred Command Line / Terminal tool on Linux or Mac OSX.

Check if dockers daemon is running

docker

Check your docker version

docker -v