Please follow the following steps to build the img file: Step A: ./01-unzip-linux-3.x.sh Step B: cd ./workspace/linux-3.x make ARCH=x86_64 CROSS_COMPILE=../x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- menuconfig make ARCH=x86_64 CROSS_COMPILE=../x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- modules make ARCH=x86_64 CROSS_COMPILE=../x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- bzImage Step C: ./02-build-img-file.sh Finally, you can burn the img file to the USB disk.