How to Install Adobe Flash Player on Ubuntu
To install adobe flash player on Ubuntu you need some extra packages first that is Canonical Partners repository.
Then enter the following command as root in order to enable the repository
$ sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"
The next step is to update your system repositories so that the latest available version of the software can be installed. Run the following command as root in order to do so:
$ sudo apt update
Now Install the Flash Plugin through the apt package:
$ sudo apt install flashplugin-installer
The system will prompt you with a Y/n option in order to begin the installation procedure. Please enter Y and hit Enter to begin. The Flash Plugin will then be installed on your system. Exit the Terminal by entering the exit command:
Open one of the available web browsers on your system. Restart the web browser if it is already open and then open the following link on the official Adobe website.
You will see a few points in the Flash Player Help.
This is how you install adobe flash player on ubuntu. If you need other help regarding flash player may be this document will help you.