GNU/Linux Ubuntu 20.04 Epson ES-400 Scanner Setup – Step-by-step Guide
Hi! The Tutorial shows you Step-by-Step How to Download and Install Epson WorkForce ES-400 Scanner Driver for Ubuntu 20.04 Focal LTS GNU/Linux Desktop.
And this Guide Shows also How to Get Started Epson ES-400 Scanning on Ubuntu 20.04.
Epson Image Scan! for Ubuntu is a Software that provides Graphical User Interface for Scanning on Linux Desktops.
It Includes the Driver – called backend (Epkowa) – an the Graphical Interface which enables you to Scan in Black & White.
Finally, to Get Installed the proper Image Scan release for your Printer is enough to Search on Epson Download Center for the Printer’s Model.

1. Launching Terminal
Then Open Shell Terminal window
Ctrl+Alt+t on Desktop.
(Press “Enter” to Execute Commands)And Update the Apt Repo:
sudo apt update