1、在windown下，将firmware_ls1088ardb_uboot_qspiboot.img、flex_linux_arm64.itb、ubuntu_xenial_arm64_rootfs_201803051215.tgz、bootpartition_arm64_lts_4.9.tgz
拷贝到u盘下（fat32格式）；
2、启动目标板，进入uboot环境
sf probe
usb start
fatload usb 0 a0000000 firmware_ls1088ardb_uboot_qspiboot.img
sf erase 0 +$filesize && sf write 0xa0000000 0 $filesize && fatload usb 0 a0000000 flex_linux_arm64.itb
bootm a0000000#ls1088ardb
3、启动进入系统后，将/run/media/sda1下的先备份，然后执行
flex-installer -i pf -d /dev/sda
flex-installer -i install -b bootpartition_arm64_lts_4.9.tgz -r ubuntu_xenial_arm64_rootfs_201803051215.tgz -m ls1088ardb -d /dev/sda
4、reboot进入u盘系统