|  | 
| / # mkdir -p /mnt/usb /mnt/root / # mount /dev/sda3 /mnt/root
 / # mount /dev/sdb1 /mnt/usb
 / # cp -r /mnt/usb/boot /mnt/root/
 cp: write error: No space left on device
 cp: write error: No space left on device
 cp: write error: No space left on device
 / # cd /mnt/root/boot
 /mnt/root/boot # rm uImage uRamdisk
 /mnt/root/boot # mv uImage-wdrecovery uImage
 /mnt/root/boot # mv uRamdisk-wdrecovery uRamdisk
 /mnt/root/boot # cd /
 / # umount /mnt/root /mnt/usb
 / # sync
 / # reboot -f
 
 敲命令有报错
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