Driver Epson ET-3700 Ubuntu 18.04 Setup – Step-by-step Guide
How to Install Printer Epson ET-3700 Ubuntu 18.04 Bionic LTS GNU/Linux desktop – Step by step Tutorial.
And the Epson ET-3700 Ubuntu 18.04 Installation guide includes also instructions on How to Get Started Scanning on Ubuntu.
Especially relevant: using the Epson Printer Utility Software, you can Check Ink Levels, View Error and other Status… on EPSON ET-3700 Series Printers.
Finally, to Get the Epson ET-3700 Series Printers Installed on Ubuntu Linux you need to Download and Install the Epson Proprietary Driver.
 
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1. Launching TerminalOpen a Terminal window 
 Ctrl+Alt+t on desktop
 (Press “Enter” to Execute Commands)  
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2. Updating Ubuntu ReposThen Update Ubuntu Bionic Repositories: 
 This step is a precaution in case the sources are not Up to Date.
 So if you prefer try first to Install it directly like shown here below..sudo apt update 
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