How can I display the version of my Jupyter notebook and run cells in Jupyter notebooks? I get an error: bad interpreter

From your terminal, you can simply do:

jupyter --version

Or, if you are using a notebook then do:

!jupyter --version

Here is the output in my case:

jupyter core     : 4.5.0
jupyter-notebook : 5.2.2
qtconsole        : 4.5.2
ipython          : 5.5.0
ipykernel        : 4.10.1
jupyter client   : 5.3.1
jupyter lab      : not installed
nbconvert        : 5.5.0
ipywidgets       : 7.5.0
nbformat         : 4.4.0
traitlets        : 4.3.2