您即将离开哈喽比特，请留意您所访问的内容是否安全。
http://cdimage.ubuntu.com/releases/19.10.1/release/ubuntu-19.10.1-preinstalled-server-arm64+raspi3.img.xz?_ga=2.43428645.1004561930.1575890285-1215074386.1571997999
