Installing Docker on Ubuntu
Andrew B. Collier
This procedure works on both my laptop and a fresh EC2 instance.
Add the GPG key for Docker.
curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg | sudo apt-key add -
Add the details of the Docker repository.
OSNAME=$(. /etc/os-release; echo "$ID") OSVERS=$(lsb_release -cs) sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/$OSNAME $OSVERS stable"
Update the package index.
sudo apt update
Install the Community Edition package.
sudo apt install docker-ce
sudo docker run hello-world
The output from the test should look something like this:
Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world 5b0f327be733: Pull complete Digest: sha256:1f1404e9ea1a6665e3664626c5d2cda76cf90a4df50cfee16aab1a78f58a3f95 Status: Downloaded newer image for hello-world:latest 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. 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://cloud.docker.com/ For more examples and ideas, visit: https://docs.docker.com/engine/userguide/
Note that the
docker command currently requires superuser privileges. To allow
docker for mere mortals, add their accounts to the
sudo gpasswd -a ubuntu docker
On that user’s next login the
docker group will be added to their profile and they will be able to launch
I’ve wrapped the installation up in a very simple Gist. You can source the gist and install using
$ wget -q -O - https://bit.ly/2JGrYR2 | /bin/bash