Install Docker on Ubuntu 20.04

install-docker-ubuntu-20.04.md

Install Docker on Ubuntu 20.04 Focal

From this page: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04

Step 1 — Installing Docker

• sudo apt update
• sudo apt install apt-transport-https ca-certificates curl software-properties-common
• curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
• sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
• apt-cache policy docker-ce

  docker-ce:
    Installed: (none)
    Candidate: 5:19.03.9~3-0~ubuntu-focal
    Version table:
       5:19.03.9~3-0~ubuntu-focal 500
          500 https://download.docker.com/linux/ubuntu focal/stable amd64 Packages
  

• sudo apt install docker-ce
• sudo systemctl status docker

  Output
  ● docker.service - Docker Application Container Engine
       Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
       Active: active (running) since Tue 2020-05-19 17:00:41 UTC; 17s ago
  TriggeredBy: ● docker.socket
         Docs: https://docs.docker.com
     Main PID: 24321 (dockerd)
        Tasks: 8
       Memory: 46.4M
       CGroup: /system.slice/docker.service
               └─24321 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
  

Step 2 — Executing the Docker Command Without Sudo (Optional)

Output
docker: Cannot connect to the Docker daemon. Is the docker daemon running on this host?.
See 'docker run --help'.

• sudo usermod -aG docker ${USER}
• su - ${USER}
• groups

  Output
  sammy sudo docker
  

• sudo usermod -aG docker username