GNU/Linux Mint 21.x Installing Keras – Step by step Guide
YInstall Keras in GNU/Linux Mint 21.x Vanessa/Vera/Victoria/Virginia LTS desktop – Step by step Tutorial.
And Keras for Linux Mint 21 is a High-level Neural Networks API, written in Python and capable of Running on Top of TensorFlow, CNTK, or Theano.
It was Developed with a focus on enabling Fast Experimentation. Being able to go from Idea to Result with the least possible Delay is key to doing Good Research.
Before installing Keras, please install one of its backend engines: TensorFlow, Theano, or CNTK. Here is shown How to Install Recommended TensorFlow backend.
Finally, this guide includes detailed instructions on Getting Started with Keras on Linux Mint.

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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