sudo apt install qemu-system-arm qemu-system-mips qemu-efi-aarch64 qemu-kvm qemu-efi cloud-image-utils

dd if=/usr/share/qemu-efi/QEMU_EFI.fd of=flash0.img conv=notrunc
dd if=/dev/zero of=flash1.img bs=1M count=64

#cloud-config
password: thepassword
chpasswd: { expire: False }
ssh_pwauth: True
EOF

#create a user-data image cloud-localds user-data.img user-data

#download img

cp ubuntu-18.04-server-cloudimg-arm64.img ubuntu-18.04-server-cloudimg-arm64.img.orig

sudo qemu-system-aarch64 -m 1024 -cpu cortex-a57 -M virt -nographic -pflash flash0.img -pflash flash1.img -drive if=none,file=ubuntu-18.04-server-cloudimg-arm64.img,id=hd0 -drive file=user-data.img,format=raw,id=cloud -device virtio-blk-device,drive=hd0 -netdev type=tap,id=net0 -device virtio-net-device,netdev=net0