How to Use update-alternatives Command on Ubuntu

using update-alternatives command, you can make a new executable python (/usr/local/bin/python) and add all the available Python versions to the alternatives database. Then, you can easily set which version of Python to use by default. You can also switch between the Python versions very easily. I am going to show you how to do this practically in this article. That way, you will gain practical knowledge of how update-alternative works.