For example, `openEuler-20.09.img`. The default is `openEuler-aarch64-raspi.img`, or it is automatically generated based on parameter: `-r, --repo REPO_INFO`.
For example, `openEuler-20.09-RaspberryPi.aarch64.img`. The default is `openEuler-RaspberryPi.aarch64.img`, or it is automatically generated based on parameter: `-r, --repo REPO_INFO`.