If I have lots of TX2, and cannot plug all of them to host Ubuntu by micro-USB, is that possible to flash them by Ethernet? If yes, may I have the instructions? thanks!
NO, we don’t support flashing tegra platforms over ethernet.
please refer to Flashing and Booting the Target Device, so far, you must need to connect the board to host device to flash the board.
besides flash entire board,
you are able to update kernel and device tree via ethernet.
for example, you may refer to Topic 1035668 about how to update device tree via ethernet.