Is it possible to navigate to a parent directory in the jupyter tree?

Question

Normally, I launch jupyter from a new bash terminal:

~$ jupyter notebook

and then navigate down the tree to the files I want to wo

Answer 1

As edwinksl pointed out it is not possible for security reasons. See https://github.com/jupyter/notebook/issues/2032.

But if you want to keep your luis.ipynb file in its original location and still be able to access it from Jupyter Notebook browser, you can create a symlink to it in your running Jupyter Notebook directory:

ln -s ~/blah/thingy/luis.ipynb ~/blah/blah/blah/

For more details on symlinks see https://www.howtogeek.com/297721/how-to-create-and-use-symbolic-links-aka-symlinks-on-a-mac/