Installation and configuration of docker in Ubuntu 18.04

install_docker_ubuntu_18_04.adoc

Installation and configuration of docker in Ubuntu 18.04

Install docker package

Below are the steps to install docker in ubuntu 18.04

• First update existing packages.

$ sudo apt update ; sudo apt upgrade

• Install utility packages

$ sudo apt install apt-transport-https ca-certificates curl software-properties-common

• Add GPG key

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

• Add docker repository to apt sources.

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

• Update apt sources and install docker

$ sudo apt update ; sudo apt install docker-ce

• Verify docker service is started.

$ sudo systemctl status docker

Enable docker command execution without sudo.

• We need to add user to docker group to enable docker command execution without sudo user.

  • To add current user

    $ sudo usermod -aG docker ${USER}

  • Alternatively to add any other user

    $ sudo usermod -aG docker <username>

• Verify if user is added is added to docker group by listing the groups the user is added to.

$ id -nG ${USER}

• Logout and login to session.

su - ${USER}