GNU/Linux Ubuntu Installing Python Processing – Step by step Guide
How to Install Python 2.7+ Processing 3+ Module on Ubuntu GNU/Linux desktops – Step by step Tutorials.
And Processing Python for Ubuntu is the API for the Python Programming Language.
Finally, this guide includes detailed instructions on Getting Started with Processing Python on Ubuntu.

1. Launching Terminal App
Open a Terminal Shell Emulator Window:
Ctrl+Alt+t on desktop
(Press “Enter” to Execute Commands)
And to Update the Apt Repos:sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.
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