login: root password: password legacy kernel image update to the current version of the rootfs 2020.11.15 kernel version 5.9.12 installation on a sdcard Unpack the IMAGE file and record by running the following on the SD card ( /dev/mmcblk0 = your sd card device ): dd if=slarm64-current-*-base-rootfs-*-build-*.img of=/dev/mmcblk0 bs=1M or zstdcat slarm64-current-*-base-rootfs-*-build-*.img.zst > /dev/mmcblk0 debug Rock Pi S v11 and higher speed(baudrate) 115200 26-pin Header 1 uart0 ROCK Pi S <---> USB to TTL cable RX(pin 10) <---> TXD TX(pin 8) <---> RXD GND(pin 6) <---> GND new uart2 RX(pin 21) <---> TXD TX(pin 19) <---> RXD GND(pin 20) <---> GND example: screen /dev/ttyUSB0 115200,cs8