GNU/Linux Ubuntu 18.04 Canon MX420 Printer Setup – Step by step Guide
How to Install Canon PIXMA MX420 Printer Driver on Ubuntu 18.04 Bionic LTS Desktop.
And the Canon PIXMA MX420 Printer Installation on Ubuntu 18.04 simply involve to Download the Proprietary driver and execute few Basic Commands on Shell.
Especially relevant: after Installing the Driver to achieve the Setup follow instructions to Add Canon MX420 Printer.
Finally, included in the guide also detailed instructions to Getting Started with Canon MX420 Scanning on Ubuntu.

1. Launching Terminal
Open a Terminal Shell emulator window
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands).
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