Install Docker engine on a Ubuntu 20.04

You need docker engine to build docker image, run image as a container and so on.

Ref: https://docs.docker.com/engine/install/ubuntu/

  1. Remove the old:

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

    It’s OK if apt-get reports that none of these packages are installed.

  2. Install some lib:

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

  3. Add Docker’s official GPG key:

    BASH
    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

  4. Setup stable repository:

    BASH
    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
    

    sudo apt-get update

  5. Install docker things:

    BASH
    sudo apt-get -y install docker-ce docker-ce-cli containerd.io

  6. Now, you should be able to:

    BASH
    sudo docker login

Note:

On a Ubuntu you need to install `Docker` and `docker-compose` repectively.

To Install `docker-compose`, just:

  1. Download from github with `curl`.

    DOCKER
    sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

  2. Make it executable.

    DOCKER
    sudo chmod +x /usr/local/bin/docker-compose