Getting Started with Docker

Getting started with docker

Docker Installation in Ubuntu Linux

For the following Ubuntu Versions

  • Ubuntu Jammy 22.04 (LTS)
  • Ubuntu Impish 21.10
  • Ubuntu Focal 20.04 (LTS)
  • Ubuntu Bionic 18.04 (LTS)

If you have Older Docker version or already installed and went remove, then run the below commands

Docker Remove Commands

$ sudo apt-get remove docker docker-engine docker.io containerd runc

$ sudo rm -rf /var/lib/docker /etc/docker
$ sudo rm /etc/apparmor.d/docker
$ sudo groupdel docker
$ sudo rm -rf /var/run/docker.sock

above commands will remove docker completely from your system

Now let’s start installation of docker

First update your system

$ sudo apt-get update

Run below command to install packages to allow apt to use a repository over HTTPS:

Add docker repositories in your ubuntu system

$ sudo apt-get install \
ca-certificates \
curl \
gnupg \
lsb-release

Now add docker official GPG key’s in your ubuntu system for this create separate directory for docker

$ sudo mkdir -p /etc/apt/keyrings

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

Now add the Docker Repository to APT sources list

$ echo \ “deb [arch=$(dpkg –print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable” | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Install Docker Engine

$ sudo apt-get update

$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

Now docker is installed, check the docker status

$ sudo systemctl status docker

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