JupyterHub
Introduction
Jupyter is a project aimed at providing an interactive computing environment. It provides a way to run code inside a kernel from a browser. There exist a number of different kernels availible, written in different languages and it is trivial to extend base kernel with custom computing enviroment. There are two standard web interfaces, Jupyter Notebook and Jupyter Lab, as well as a certain number of spinoffs of note nteract.
JupyterHub brings the power of notebooks to a group of users. It is installed on a server therefore providing access to computational environments and resources without the need for users to carry out installation or maintenance tasks.
Adding extensions
JupyterHub is installed into /opt/jupyterhub
meaning if you need to have access to jupyter executable or the python used by jupyterhub (not the pangeo kernel) it is here: /opt/jupyterhub/bin/