Installation to star-animation NS-3 simulation on Ubuntu virtual box

Getting to run star-animation NS-3 Simulation on Ubuntu 20.04

NS-3 is a simulator for IoT devices apart from Internet systems. Below we present how to get to run star-animation from installation on a virtual Ubuntu box on Windows Hyper-V.

See the star-animation video here on the NS-3 simulator.

This write-up begins with installation on Ubuntu 20.04 for python-3.

Step-1: If intending to run on a virtual box on Windows-10, and looking to set up virtualization for setting up the NS-3 network simulator, you may refer to the Hyper-V install here.

Step-2: Install required libraries for C++, Python API, NetAnim animator, Bake build tool, git, python bindings, etc, referring to the official steps below for the installation.
https://www.nsnam.org/wiki/Installation
https://www.nsnam.org/docs/release/3.30/tutorial/singlehtml/index.html

Since the official steps cover installation for earlier versions of python, make sure to stay focussed on python-3 libs.