掌機 - Miyoo Flip - 如何透過overlayfs修改/usr資料夾

# cd /mnt/SDCARD
# mkdir -p ext4

# dd if=/dev/zero of=ext4.img bs=1M count=128
# mkfs.ext4 ext4.img

# mount -o loop ext4.img ext4
# mkdir ext4/usr
# mkdir ext4/usr/work
# mkdir ext4/usr/merged_usr
# mkdir ext4/usr/upper

# mount -t overlay overlay -o lowerdir=/usr,upperdir=/mnt/SDCARD/ext4/usr/upper,workdir=/mnt/SDCARD/ext4/usr/work /mnt/SDCARD/ext4/usr/merged_usr
# mount --bind /mnt/SDCARD/ext4/usr/merged_usr /usr

# touch /usr/lib32