Question
Where is my Dockerfile with "docker pull ubuntu"?
- Posted on June 20, 2016
- Docker
Asked by alxvallejo
I really don’t see the point of this tutorial: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04
Since it relies on a docker pull ubuntu image, where can I edit that Dockerfile to customize it further? Shouldn’t you typically rely on a Dockerfile for docker containers? The tutorial mentions that Dockerfiles are “beyond the scope” of the tutorial which I just find odd.
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Hi @alxvallejo,
In this case, the Docker image is already builded from a Dockerfile, and stored on the Docker hub platform.
When you run the pull command, Docker will just download the latest image of “ubuntu” from https://hub.docker.com/_/ubuntu/
If you click the “xenial/Dockerfile” link on this page, you will see the actual Dockerfile used to build the image.
If you need to customize this image, you should create a Dockerfile, with the first line:
Then you can add all your customizations.