GNU/Linux Ubuntu 16.04 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 16.04 Xenial LTS GNU/Linux Desktop.
And this Guide Shows also How to Get Started Epson ES-400 Scanning on Ubuntu 16.04.
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)In case first see: Terminal QuickStart Guide.
And Update the Apt Repo:sudo apt update