The orange pi zero has a USB OTG interface, which can be used to interact with it in the absence of networks and spare USB-UART converters.   This is not enabled by default in the Armbian image.   Here I describe how to modify the system image before first boot to enable this.   First, mount the freshly written SD card on a linux computer, become root, and change directory to the mount point, that is, the root directory of the SD card. The following couple of steps were taken from http