BPI-M2+的ubuntu系统已经有最新的，所以就升级到最新版本上。步骤如下：

下载合适的对应的版本。

Step 1: Start up the computer with the SD card which has been burnt with the Linux images.--首先要烧写该镜像到sd卡上。

Step 2: Put the images which you'd like to burn to the EMMC Storage to the USB drive.--其次要把该镜像放到U盘上，用来烧写到emmc上。

Step 3: Run "fdisk -l" command line on your BPI-M2+ and you can see the EMMC path as " /dev/mmcblk1"

sudo fdisk -l

Step 4:Switch to the path of images, and run the command.

sudo dd if= xxx.img of=/dev/mmcblk1 bs=10MB

xxx.img is your image file name

这个地方，要到U盘挂在的地方，我的板子挂在在media\pi\下。

Step 5:When finish burning, remove the SD card, and restart the BPI-M2+

Step 6:Check if the system starts normally on the EMMC flash boot.

烧写之后，wifi和bt可以使用。

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