This is a Ruby kernel for IPython.
At first install the packages ipython, python-jinja, python-tornado, python-pyzmq so that you get a working ipython notebook.
Maybe the packages are called slightly different on your Unix.
Now install the rubygem using gem install iruby and then run iruby notebook or iruby.
Take a look at the Example Notebook.
See the CONTRIBUTORS file.
See the LICENSE file.