How To Install and Use Docker on Ubuntu 20.04

Docker adalah layanan yang menyediakan kemampuan untuk mengemas dan menjalankan aplikasi di lingkungan terisolasi yang disebut container. Dengan isolasi dan keamanan yang memadai, banyak container dapat berjalan secara bersamaan pada host tertentu.

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

You’ll see output like this, although the version number for Docker may be different:

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

Notice that docker-ce is not installed, but the candidate for installation is from the Docker repository for Ubuntu 20.04 (focal).

Finally, install Docker:

sudo apt install docker-ce

Executing the Docker Command Without Sudo (Optional)

sudo usermod -aG docker ${USER}

su - ${USER}

groups