I uploaded u-boot files and scripts (boot.ini) to the site for testing with LE and Armbian images. After writing the image to the SD card, you need to write the u-boot file with two commands.   dd if=u-boot-s805-odroid-c1.img of=/dev/<you_sd_card> conv=fsync bs=1 count=442 dd if=u-boot-s805-odroid-c1.img of=/dev/<you_sd_card> conv=fsync bs=512 skip=1 seek=1   Add one of the options (boot.ini) for the desired system to the SD card. Download the desired boot.in