For the Orange Pi Zero, you can just download an Armbian SD card image much like you would with Raspbian - except that unlike Raspbian, everything but the kerne

For the Orange Pi Zero, you can just download an Armbian SD card image much like you would with Raspbian - except that unlike Raspbian, everything but the kernel and bootloader is just stock Debian and receives updates straight from Debian. (In theory the next upcoming Debian release should work stock out-the-box, but it's a lot less user-friendly to get working.)