List images:

docker images

List image IDs:

docker images -q

Remove all images (delete):

docker rmi `docker images -q`



The following image is used for our continuous integration server: The build instructions are in the README.rst file in the repository.

It was created using the following commands:

mkdir gitlab-pytest
cd gitlab-pytest
touch Dockerfile

Edit Dockerfile so it contains the following:

FROM ubuntu:14.04
MAINTAINER Patrick Kimber <>
RUN apt-get update
RUN apt-get install -y libpq-dev python3-dev libxml2-dev libxslt-dev libjpeg8-dev python3-pip git postgresql-client libmysqlclient-dev tdsodbc


docker build -t pkimber/gitlab-pytest .

Create a container from the image:

docker run -t -i pkimber/gitlab-pytest /bin/bash

Log into Docker hub:

docker login

Push to Docker hub:

docker push pkimber/gitlab-pytest

Original Notes

Run docker (see Getting Started):

sudo docker run -i -t ubuntu /bin/bash

To view the running image, run the following command from a separate terminal:

sudo docker ps

Update the image e.g. install some software e.g:

sudo docker run -i -t ubuntu /bin/bash
root@f3924d65dfa6:/# apt-get install vim


Do not exit from the virtual machine because all your changes will be lost.

To save the changes to your image, run the following command from a separate terminal:

# get the container ID
sudo docker ps
ID            IMAGE         COMMAND    CREATED        STATUS        PORTS
4b7a3737643a  ubuntu:12.04  /bin/bash  5 minutes ago  Up 5 minutes

In the above example, the container ID is 4b7a3737643a.

Now commit the changes to your image, giving it a name. In this example, the name is vim:

sudo docker commit 4b7a3737643a vim
# to give your image a name AND tag
sudo docker commit 45d674f6db96 vim:version1

To list the images - which should include the image you just created:

sudo docker images

To run this image:

sudo docker run -i -t vim /bin/bash

e.g. to run ubuntu, 14.04:

$ sudo docker images
ubuntu      12.04    b9e56c8f2cf5  2 hours ago  103.9 MB
ubuntu      13.10    195eb90b5349  4 weeks ago  184.7 MB
ubuntu      14.04    e54ca5efa2e9  4 weeks ago  276.5 MB

sudo docker run -i -t ubuntu:14.04 /bin/bash