Enabling a USB Serial Port Console: getty systemd | Linux & Open Source
* Source: https://www.rogerirwin.co.nz/linux-open-source/enabling-a-serial-port-console/
* Update by Phillips Hsieh
Using the serial port to login is a good way to get access to a device that doesn't have a network connection. This could be a small embedded Linux computer.
Raspberry Pi
enable_uart=1
# after