Docker

Begin

Setup apt repos

#! Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

#! Add the repository to Apt sources:
echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

Install the latest version of Docker and related packages

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Verify Docker installation

sudo docker run hello-world

The output should look something like

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.
    (amd64)
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/

Finish Docker Setup

Create the docker group

sudo groupadd docker

Add your user $USER to the docker group, make sure to replace $USER with the correct value for your setup!

sudo usermod -aG docker $USER

Activate the change

newgrp docker

Verify the changes

docker run hello-world

The output should look something like

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.
    (amd64)
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/

If there are issues try logging out of your user and logging back in.
If you’re connected over SSH, restarting the connection might be necessary.
Sometimes a full reboot might be necessary.