How to install Docker on Ubuntu Linux 18.04 desktop machine?

How to install Docker on Ubuntu Linux 18.04 desktop machine?

    Docker is available in two editions: Community Edition (CE) and Enterprise Edition (EE). Here, we'll proceed with Docker CE, the Community Edition. To do a clean installation, you must first remove existing Docker installation, if anything found. And then proceed with Docker installation by configuring and updating its Debian repository on our local machine. This is most recommended way of installing Docker on Ubuntu Linux operating system. Once the installation is done, you need to verify Docker version to check whether it is properly installed or not.

# Remove old Docker installations to make fresh install.
$ sudo apt remove docker docker-engine docker.io containerd runc

# Check if update available for system packages.
$ sudo apt update

# Install required system packages.
$ sudo apt install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

# Add Docker's official GPG key to package manager.
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo apt-key fingerprint 0EBFCD88

# Add Docker repository to package manager source list.
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

# Install Docker packages from repository.
$ sudo apt install docker-ce docker-ce-cli containerd.io

# Check Docker version.
$ sudo docker --version
 
# Enable Docker service at boot.
$ sudo systemctl enable docker.service

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