Ref:

• https://stackoverflow.com/questions/50982686/what-is-the-difference-between-jupyter-notebook-and-jupyterlab - answers “What is the difference between Jupyter Notebook and JupyterLab?”
• https://jupyter.org/install - contains the launch and install commands

jupyter_core

Justification:

 % which jupyter      
/home/rajulocal/miniconda3/envs/py310/bin/jupyter

 % cat `which jupyter`               
#!/home/rajulocal/miniconda3/envs/py310/bin/python

...
from jupyter_core.command import main

if __name__ == '__main__':
    ....
    sys.exit(main())

Tested on a machine running Debian 11 (bullseye).

• https://docs.jupyter.org/en/latest/ - Jupyter project documentation
• https://github.com/jupyterlab/jupyterlab - source code of JupyterLab computational environment.

• Jupytext notes