Thank you for your reply
Now I just flash to my board with invoking uuu.lst in tmp folder as SUPERUSER after run uuu_imx_android_flash.sh script.
My step
$ sudo ~/<image_dir>/uuu_imx_android_flash.sh -f imx8mm -a -e -u trusty
#..........line 757: uuu: command not found (this is final command in script)
$ sudo su
$ ./uuu /tmp/uuu.lst
Now start flashing to my board and success.