GNU/Linux Mint 21 Installing GNU Octave – Step by step Guide
How to Install Latest GNU Octave 10.x Flatpak App in GNU/Linux Mint 21.x Vanessa/Vera/Victoria/Virginia LTS desktop – Step by step Tutorial.
And, GNU Octave for Linux Mint 21 is a High-level Interpreted Language, primarily Intended for Numerical Computations.
Moreover, it provides capabilities for the Numerical Solution of Linear and Nonlinear Problems, and for performing other Numerical Experiments.
Again, it also provides extensive Graphics Capabilities for Data Visualization and Manipulation.
Finally, Flatpak is a technology for Building, Distributing, Installing and Running Linux Apps.

1. Terminal Getting Started Guide
How to QuickStart with Command Line on Linux Mint:
First Update the Apt Repo Sources with:
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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