Installing docker (latest version) on Ubuntu 20.04

docker-install.md

Installing docker on Ubuntu 20.04 / 22.04

Full reference here: https://docs.docker.com/engine/install/ubuntu/

Setup the repository

sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release

Add Docker’s official GPG key:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo \
  "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.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

Executing the Docker Command Without Sudo

By default, the docker command can only be run the root user or by a user in the docker group, which is automatically created during Docker’s installation process. If you want to avoid typing sudo whenever you run the docker command, add your username to the docker group:

sudo usermod -aG docker ${USER}

If you need to add a user to the docker group that you’re not logged in as, declare that username explicitly using

sudo usermod -aG docker username