求救高人大佬。如何可以恢复到出厂状态。我使用recoverbackup命令后的返回信息是：
recoverbackup执行后
dd: failed to open '/dev/mmcblk0p2': Permission denied
dd: failed to open '/dev/mmcblk0p5': Permission denied
Failed to set wall message, ignoring: Interactive authentication required.
Failed to reboot system via logind: Interactive authentication required.
Failed to open initctl fifo: Permission denied
Failed to talk to init daemon.
ubuntu@hi3798mv100:~$
全部失败
求神雕坛主，高手大佬给予点睛指导
