After installing Anaconda in Ubuntu, open a terminal windows and run:

jupyter notebook

The output should be something like…

[I 16:26:38.548 NotebookApp] JupyterLab extension loaded from /home/ntala/anaconda3/lib/python3.7/site-packages/jupyterlab
[I 16:26:38.548 NotebookApp] JupyterLab application directory is /home/ntala/anaconda3/share/jupyter/lab
[I 16:26:38.550 NotebookApp] Serving notebooks from local directory: /home/ntala
[I 16:26:38.550 NotebookApp] The Jupyter Notebook is running at:
[I 16:26:38.550 NotebookApp] http://localhost:8888/?token=1db733c81f435c283d9b3b2c8a7886720ab391d3ee0d2b98
[I 16:26:38.550 NotebookApp]  or
[I 16:26:38.550 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 16:26:38.571 NotebookApp] 
To access the notebook, open this file in a browser:
Or copy and paste one of these URLs:

A new window in a browser should appear showing Jupyter. Please create a new Python 3 notebook:

After clicking…

Next to the logo, click on “Untitled” to replace it with any other name and press “Rename”.