curl -o initrd https://cloud-images.ubuntu.com/focal/current/unpacked/focal-server-cloudimg-arm64-initrd-generic
curl -o kernel.gz https://cloud-images.ubuntu.com/focal/current/unpacked/focal-server-cloudimg-arm64-vmlinuz-generic
gunzip kernel.gz
curl -o disk.tar.gz https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-arm64.tar.gz