Docker Engine

Install Docker Engine on Linux

For any Linux machine, the commands below will install Docker.

These commands are the (almost) universal install instructions for Docker on Linux.

The commands work on any architecture, and on any system running Linux, from a cloud server to a Raspberry Pi.

The commands can also be used in the Windows Subsystem for Linux 2 (WSL 2) and on a Chromebook.

Run installer

    

        
        
            curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
        
    

Add user

Add the user to the docker group. The newgrp command avoids the need to logout and back in.

    

        
        
            sudo usermod -aG docker $USER ; newgrp docker
        
    

Confirm installation

To confirm the installation is successful run:

    

        
        
            docker run hello-world
        
    

The output should be a welcome message such as:

    

        
        Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (arm64v8)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

        
    

Use the uname command to identify the architecture:

    

        
        
            uname -m
        
    

Output values can be aarch64 (Arm 64-bit), armv7l (Arm 32-bit) or x86_64.

Docker Engine versions

The Stable channel (get.docker.com) provides the latest releases for general availability.

The Test channel (test.docker.com) installs pre-releases that are for testing before general availability.

Replace get.docker.com with test.docker.com above to use the test version.

Linux distributions where get.docker.com isn’t supported

Some Linux distributions are not supported by get.docker.com

Generally, the supported list is:

• Ubuntu
• Debian
• SUSE Linux Enterprise Server
• Red Hat Enterprise Linux
• Fedora
• CentOS

An example of a distribution which is not supported and popular on Arm is Manjaro .

On Manjaro, install docker using pacman.

    

        
        
            sudo pacman -Syu 
sudo pacman -S docker
sudo systemctl enable docker
sudo systemctl start docker
sudo usermod -aG docker $USER ; newgrp docker
        
    

To confirm the installation is successful run the same hello-world as above.

    

        
        
            docker run hello-world
        
    

Start and Stop the Docker daemon on Linux distributions with systemd

To start the docker daemon.

    

        
        
            sudo systemctl start docker
        
    

To stop the docker daemon.

    

        
        
            sudo systemctl stop docker
        
    

If a message is displayed:

    

        
        Warning: Stopping docker.service, but it can still be activated by:
  docker.socket

        
    

Then stop docker.socket:

    

        
        
            sudo systemctl stop docker.socket
        
    

Docker Engine is now ready to use. You can explore Docker related Learning Paths .

You may want to create an account on Docker Hub to share images and automate workflows.