树莓派SD卡镜像制作代码

#!/bin/sh

sudo losetup /dev/loop0 original.img

mkdir -p img_temp/boot/

mkdir -p img_temp/root/

sudo kpartx -av /dev/loop0 

boot="/dev/mapper/loop0p1"

root="/dev/mapper/loop0p2"

sudo mount $boot img_temp/boot/

sudo mount $root img_temp/root/

sudo dd if=/dev/zero of=raspberrypi.img bs=1M count=2048

sudo parted raspberrypi.img --script -- mklabel msdos

sudo parted raspberrypi.img --script -- mkpart primary fat32 204800s 729087s

sudo parted raspberrypi.img --script -- mkpart primary ext4 729088s -1

loopdevice=`sudo losetup -f --show raspberrypi.img`

device=`sudo kpartx -va $loopdevice | sed -E 's/.*(loop[1-9])p.*/\1/g' | head -1`

echo "yansci 5miao"

sleep 5

device="/dev/mapper/${device}"

partBoot="${device}p1"

partRoot="${device}p2"

echo $partBoot

ls /dev/mapper/

sudo mkfs.vfat $partBoot -n boot

sudo mkfs.ext4 $partRoot

sudo mount -t vfat $partBoot /media

sudo cp -rfp img_temp/boot/* /media/

sync

sudo umount /media

sudo mount -t ext4 $partRoot /media/

cd /media

sudo dump -h 0 -0uaf - $root | sudo restore -rf -

cd -

sudo umount /media

#存储位置相差8个偏移，必须加上

dd if=/dev/loop0 of=$loopdevice skip=8 seek=8 count=204790

sudo kpartx -d $loopdevice

sudo losetup -d $loopdevice

sudo umount img_temp/boot

sudo umount img_temp/root

sudo rm -rf img_temp

sudo kpartx -d /dev/loop0

sudo losetup -d /dev/loop0