--Alpine 下构建最小 initramfs
make initramfs{
	apk add busybox-static cpio gzip file

	su - jin
	mkdir source
	cd source/
	rootfs/init {
		cat > rootfs/init << 'EOF'
		#!/bin/sh

		mount -t proc none /proc
		mount -t sysfs none /sys

		echo "== PXE Poweroff =="

		# 尝试正常关机
		/bin/busybox poweroff -f

		# fallback：强制断电（关键！）
		echo o > /proc/sysrq-trigger

		sleep 3

		# 再不行就重启
		/bin/busybox reboot -f
		EOF
	}
	chmod +x rootfs/init
	
	cd rootfs/bin/
	ln -s  busybox  sh
	

	su - root
	cd /home/jin/source

	mkdir -p rootfs/dev
	mknod -m 622 rootfs/dev/console c 5 1

	cd rootfs
	find . | cpio -o -H newc | gzip > ../initramfs.img
}

cp file{
	mkdir alpine_v3_18_poweroff
	cd /media/dev/tftpboot/vmlinuz/alpine_v3_18_poweroff
	cp -p  /home/jin/source/initramfs.img  ./
}