I want to burn uboot, kernel, dbt, rootfs to the SD card through Linux, and then insert the SD card to start directly. I can use MFGTools to complete my needs, but I don't want to use MFGTools. I want to change the way. I checked your i.MX_Linux_User's_Guide manual, which uses tftp to download the kernel. I don't want to use tftp. At the same time, I use the dd command of the MFGTools appendix to burn to the front of the SDCard, zImage, dtb copied to sdc1, rootfs.tar.ba2 decompressed into sdc2, but the development board can not run normally, stuck in the starting kernel.. .