GNU/Linux Ubuntu 20.04 Installing Flash Plugin – QuickStart Guide
Hi! The Tutorial shows you Step-by-Step How to Install the Latest Adobe Flash Plugin in Ubuntu 20.04 Focal LTS GNU+Linux Desktop.
And the Adobe Flash Player Plugin for Ubuntu allows Browsers such as Firefox, Chromium and Opera to display Flash Media on web pages.
Finally, the Latest Flash Plugin Version is in PPAPI form that is Bundled in Google-Chrome with the Required libpepflashplayer.so.
Especially relevant: to know how Flash has been RETIRED from Adobe on 31 December 2020!

1. Launching Terminal
How to Quick Start with Command Line on Ubuntu
Here GNU/Linux Ubuntu Console Quick StartLink to Step-by-Step Guide on Getting Started with Command Line on Terminal/Console in Ubuntu GNU/LinuxUpdate Apt Repo Sources with:
Copysudo apt update