A: I have a few questions to ask: 1. Can we just turn off the modules we don’t use in myimx6_defconfig? Do we need to modify other ones? 2. How to configure the second network port? 3. The rootfs is a bit large when burning the board. Can I write the smaller one? 4. Will all the files in image-L4.1.15-update be updated during burning? 5. What are the functions of the two rootfs and qt in the image-L4.1.15-update folder? B: 1. It can be turned off. Just turn off the system and it will be normal. 2. The default is dual network ports. 3. If you can use the small file system normally, there is no problem. 4. update will overwrite the board. 5. The package in the update directory will configure and update the file system. A: The default program on the development board is a single network port. The program I recompiled according to our file also has a single network port. B: Refer to the test manual to test the second network port. A: Can I delete the ones I don’t need from the update directory? B: The image-L4.1.15-update directory cannot be deleted.