Problems:

jupyter-notebook re-install error:

Error executing Jupyter command ‘notebook’: [Errno 2] No such file or directory

or

When you install:

python3 -m pip install jupyter

Start error: Error executing Jupyter command ‘notebook’: [Errno 2] No such file or directory

 

Solution:

Install with the command:

sudo apt install jupyter-notebook

and Start with:

jupyter-notebook