우분투 18.04 또는 16.04 64bit OS 설치

$ tar xf flexbuild_lsdk1803_k4.9_200922-nand-1.tgz
$ cd flexbuild_lsdk1803_k4.9_200922-nand-1/
$ rm -rf build
$ sudo tar xf ../flexbuild_lsdk1803_k4.9_200922-nand_build-image-1.tgz
$ mv flexbuild_lsdk1803_k4.9_200922-nand_build-image-1 build


$ source ./setup.env
$ ./crz_build_uboot_sd.sh
$ ./crz_build_kernel.sh


sudo umount /dev/sdc*
$ sudo fdisk /dev/sdc

Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): d
Partition number (1-3, default 3):

Partition 3 has been deleted.

Command (m for help): d
Partition number (1,2, default 2):

Partition 2 has been deleted.

Command (m for help): d
Selected partition 1
Partition 1 has been deleted.

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-31116287, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-31116287, default 31116287): 20480

Created a new partition 1 of type 'Linux' and of size 9 MiB.

Command (m for help): n
Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (2-4, default 2):
First sector (20481-31116287, default 22528):
Last sector, +sectors or +size{K,M,G,T,P} (22528-31116287, default 31116287): 1048576

Created a new partition 2 of type 'Linux' and of size 501 MiB.

Command (m for help): n
Partition type
   p   primary (2 primary, 0 extended, 2 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (3,4, default 3):
First sector (20481-31116287, default 1050624):
Last sector, +sectors or +size{K,M,G,T,P} (1050624-31116287, default 31116287):

Created a new partition 3 of type 'Linux' and of size 14.3 GiB.

Command (m for help): p
Disk /dev/sdc: 14.9 GiB, 15931539456 bytes, 31116288 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x5fd0246a

Device     Boot   Start      End  Sectors  Size Id Type
/dev/sdc1          2048    20480    18433    9M 83 Linux
/dev/sdc2         22528  1048576  1026049  501M 83 Linux
/dev/sdc3       1050624 31116287 30065664 14.3G 83 Linux

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.

<전체 이미지 Write>
tools/flex-installer 수정
sudo chmod 666 /run/media/${devpartname}3/etc/hostname
sudo echo "$distroname.$machine" > /run/media/${devpartname}3/etc/hostname

flex-installer --bootpart=./build/images/bootpartition_arm64_lts_ --rootfs=./build/rfs/rootfs_ubuntu_xenial_arm64 --firmware=./build/images/firmware_ls1043ardb_uboot_sdboot.img --machine=ls1043ardb --device=/dev/sdc

부팅이 안되면 아래와 같이 수행을 한다. 
flex-installer  --firmware=./build/images/firmware_ls1043ardb_uboot_sdboot.img --machine=ls1043ardb --device=/dev/sdc
sudo tar xf build/images/bootpartition_arm64_lts_.tgz -C /run/media/sdc2
sudo cp -r build/rfs/rootfs_ubuntu_xenial_arm64/* /run/media/sdc3/
sync;sudo umount /dev/sdc*





<kernel 파일 시스템  이미지 Write>
flex-installer \
--bootpart=./build/images/bootpartition_arm64_lts_ \
flex-installer --rootfs=./build/rfs/rootfs_ubuntu_xenial_arm64 \
--machine=ls1043ardb --device=/dev/sdc