This is an old revision of the document!
Just copy one command line to linux terminal…
More info about usb-burn
curl dl.khadas.com/online/rockchip-burn | sh -s - oowow --write --spi
curl dl.khadas.com/online/rockchip-burn | sh -s - android --write
curl dl.khadas.com/online/rockchip-burn | sh -s - oowow --write
curl dl.khadas.com/online/rockchip-burn | sh -s - ubuntu --write