industrialtablet / re-build-ubuntu20.04-rootfs-for-rk3566-rk3568-rk3588

Re-build ubuntu20.04 rootfs for RK3566 RK3568 RK3588

Re-build-ubuntu20.04-rootfs-for-RK3566-RK3568-RK3588

This repository is the documentation for RK3566 RK3568 RK3588 products, written by RSD Team of HYY Technology Co.,Ltd.

1. Create new image file.

   dd if=/dev/zero of=ubuntu_rootfs.img bs=1M count=4096 		#size=4096MB

2. Formate the image file to ext4 file system.

   mkfs.ext4 ubuntu_rootfs.img

3. Mount the empty image file to ubuntu_new_rootfs fold.

   mkdir ubuntu_new_rootfs
   sudo mount ubuntu_rootfs.img ubuntu_new_rootfs

4. Mount the old image file to ubuntu_rootfs fold.

   mkdir ubuntu_old_rootfs
   sudo mount ubuntu_rootfs.img ubuntu_old_rootfs

5. Copy all old files to ubuntu_new_rootfs fold.

   sudo cp -rfp ubuntu_rootfs/* ubuntu_new_rootfs/

6. Run new file systme on virtual machine.

   bash mount.sh -m ubuntu_new_rootfs/
   root@admin:/#

7. install new softwares and exit the visual machine.

   root@admin:/#dpkg -i xxxxx.deb
   root@admin:/#exit

8. umount the images.

   bash mount.sh -u ubuntu_new_rootfs/
   sudo umount ubuntu_new_rootfs/
   sudo umount ubuntu_old_rootfs/

9. check and resize new rootfs.

   e2fsck -p -f ubuntu_rootfs.img
   resize2fs -M ubuntu_rootfs.img

10. Sovle build firmware error with "rk356x_ubuntu_rootfs.img's size exceed parameter.txt's limit! "

    Modify file device/rockchip/rk356x$ vim parameter-ubuntu-fit.txt

    rootfs partition:

    [partitition size]@[start address], userdate partition's start address is (rootfs start address + rootfs size)

    uboot partition example:

    0x00002000 *512byte = 8192 * 512byte = 4,194,304byte 4,194,304÷1024 = 4096KB 4096÷1024=4MB So uboot size is 4M

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