Ideally, you run Jupyter notebooks in a python programming environment like conda or virtualenv. To use the latter, make sure, you have virtualenv installed

which virtualenv

If that is not the case, please install it using pip:

pip install virtualenv

I typically just create env folder within the repository, where I'm currently in. To do that, use the command:

virtualenv --no-site-packages env

With

ls -lah

You should now see, that your env folder is created.

You can activate the environment with

source env/bin/activate

Then install jupyter

pip install jupyter

Check, what's been installed with

pip freeze

Some Jupyter notebooks require you to install other pyhon libraries like numpy, scikit-learn etc. With pip you can install those the same way you installed jupyter. Check the imports at the beginning of your notebook file.

With

jupyter notebook

A browser window should open, you see your folder exposed to the web and you can open the notebooks.