benbenhuo
先刷完，ssh进去替代成功了
tf卡默认不挂载
fdisk -l
回显如下，64G tf卡
Disk /dev/mmcblk1: 59.49 GiB, 63864569856 bytes, 124735488 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x500a0dff
