Update QEMU_CLOUD_IMAGES.md

docs/QEMU_CLOUD_IMAGES.md

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 # QEMU cloud images
 
+## Install cloud image utils
+
+```
+sudo apt-get update
+sudo apt-get install cloud-image-utils
+```
+
+## Download the Ubuntu Cloud Image
+
+```bash
+curl -LO https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
+
+shasum -a 256 noble-server-cloudimg-amd64.img
+0cf56a2b23b430c350311dbcb9221b64823a5f7a401b5cf6ab4821f2ffdabe76 *noble-server-cloudimg-amd64.img
+```
+
+## Create a cloud-init configuration
+
+Create a `user-data` file
+```
+cat <<EOF > user-data
+#cloud-config
+users:
+  - name: ubuntu
+    ssh-authorized-keys:
+      - <your-public-ssh-key>
+    sudo: ['ALL=(ALL) NOPASSWD:ALL']
+    groups: sudo
+    shell: /bin/bash
+EOF
+```
+
+Create an empty `meta-data` files
+```
+touch meta-data
+```
+
+## Create the cloud-init ISO
+
+```
+cloud-localds cloud-init.iso user-data meta-data
+```
+
+## Create a QCOW2 image from the ubuntu cloud image
+
+```
+# Convert the image to QCOW2 format, which supports snapshots
+qemu-img convert -O qcow2 noble-server-cloudimg-amd64.img noble-server-cloudimg-amd64.qcow2
+# Resize the image
+qemu-img resize -f qcow2 noble-server-cloudimg-amd64.qcow2 32G
+```
+
+## Run the VM with QEMU booting with UEFI
+
+```
+qemu-system-x86_64 \
+  -name ubuntu-image \
+  -machine virt,accel=kvm,type=q35 \
+  -cpu host \
+  -smp 2 \
+  -m 2G \
+  -device virtio-keyboard \
+  -device virtio-mouse \
+  -device virtio-net-pci,netdev=net0 \
+  -netdev user,id=net0,hostfwd=tcp::2222-:22 \
+  -drive file=noble-server-cloudimg-amd64.qcow2,if=virtio,format=qcow2 \
+  -cdrom cloud-init.iso \
+  -drive if=pflash,format=raw,readonly=on,unit=0,file=/usr/share/OVMF/OVMF_CODE_4M.fd \
+  -drive if=pflash,format=raw,readonly=on,unit=1,file=/usr/share/OVMF/OVMF_VARS_4M.fd
+```
+
+## Run the VM with QEMU booting with BIOS
+
+```
+qemu-system-x86_64 \
+  -name ubuntu-image \
+  -machine virt,accel=kvm,type=q35 \
+  -cpu host \
+  -smp 2 \
+  -m 2G \
+  -device virtio-keyboard \
+  -device virtio-mouse \
+  -device virtio-net-pci,netdev=net0 \
+  -netdev user,id=net0,hostfwd=tcp::2222-:22 \
+  -drive file=noble-server-cloudimg-amd64.qcow2,if=virtio,format=qcow2 \
+  -cdrom cloud-init.iso
+```
+
+## Login to the image with an ssh key
+
+```
+ssh ubuntu@localhost -p 2222
+```
+
 ## References
 
 [Launching Ubuntu Cloud Images with QEMU](https://powersj.io/posts/ubuntu-qemu-cli/)