sudo apt-get update
sudo apt-get install git fakeroot build-essential ncurses-dev xz-utils
sudo apt-get install libssl-dev bc flex libelf-dev bison
dd if=/dev/zero of=disk.img bs=1M count=256
fdisk disk.img
fdisk -l disk.img
sudo losetup -o 1048576 /dev/loop7 disk.img
sudo mkfs.ext3 /dev/loop7
sudo mkdir mnt
sudo mount -t ext3 /dev/loop7 ./mnt/
cat - > ./mnt/boot/grub/grub.cfg << EOF set timeout=10 menuentry 'liangnijian' { linux (hd0,msdos1)/boot/bzImage console=tty0 initrd (hd0,msdos1)/boot/initrd } EOF
umount /dev/loop7
losetup -d /dev/loop7