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Last pushed: 2 years ago
Short Description
Environment needed for the Udacity online course "How to Use Git and GitHub".
Full Description


Environment for the Udacity
How to Use Git and GitHub online course.

How to use this image

docker run -it -e DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix:ro --device /dev/snd --group-add audio peron/udacity-git

The directory tree mentioned in the course, version-control, with its subdirectories,
is available as a volume in the container.
The tree is pre-populated with the file templates needed.
Changes you make within this directory tree, as you progress through the course,
will be saved between sessions, as long as you don't remove the container.
Exiting the container can be done with exit. To restart a stopped container, do

docker start -ia <container-name>

Higher lessons

As you progress through the course, you will need to look at web files
from cloned repositories. The course suggests you use Chrome. This container
uses Firefox instead, which works just as well.

To view a file from inside the container, start Firefox from the command
line, with the file as an argument:

firefox index.html &

Firefox might display some errors or warnings in the terminal. If the messages interfere
with your work, you can work in a tmux session (see link under Tools below),
or redirect the output somewhere.

If you ran the docker command as displayed above,
you can actually watch the course from this Firefox instance.


To have the volume survive accidental removals of the container and image,
or image updates, and give the container a friendlier name,
use this little more verbose command

docker run -it -e DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix:ro --device /dev/snd --group-add audio -v udacity-git:/home/developer --name udacity-git peron/udacity-git

Unless you remove the volume with docker volume rm udacity-git,
your progress will survive removals of containers and images.
Exiting and restarting is the same as above.

Tools available in the image

The image contains the following tools:

  • curl for downloading files
  • diff to be able to show differences between files
  • firefox instead of Chrome
  • git since it's what the course is about :wink:
  • nano will be the editor
  • tmux in case you need to split the screen
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