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+#!/usr/bin/env bash
+set -euo pipefail
+
+### ====== SETTINGS (edit if needed) ======
+VMID="${VMID:-9013}"
+NAME="${NAME:-debian-13-cloud}"
+STORAGE="${STORAGE:-local-lvm}"     # e.g. local-lvm or local
+BRIDGE="${BRIDGE:-vmbr0}"
+CORES="${CORES:-2}"
+MEMORY="${MEMORY:-2048}"            # MB
+DISK_SIZE="${DISK_SIZE:-40G}"       # final disk size
+CIUSER="${CIUSER:-debian}"
+
+# Where to download image
+IMG_DIR="${IMG_DIR:-/var/lib/vz/template/iso}"
+IMG_URL="${IMG_URL:-https://cloud.debian.org/images/cloud/trixie/latest/debian-13-genericcloud-amd64.qcow2}"
+IMG_FILE="${IMG_FILE:-debian-13-genericcloud-amd64.qcow2}"
+
+# SSH public key source (prefer authorized_keys on Proxmox host)
+SSHKEY_SRC="${SSHKEY_SRC:-/root/.ssh/authorized_keys}"
+TMP_PUBKEY="/tmp/${NAME}-${VMID}-sshkey.pub"
+### =======================================
+
+need_cmd() { command -v "$1" >/dev/null 2>&1 || { echo "ERROR: missing command: $1"; exit 1; }; }
+
+need_cmd qm
+need_cmd wget
+need_cmd awk
+need_cmd sed
+
+echo "==> Checking SSH key source: $SSHKEY_SRC"
+if [[ ! -f "$SSHKEY_SRC" ]]; then
+  echo "ERROR: $SSHKEY_SRC not found."
+  echo "Fix: put your public key into /root/.ssh/authorized_keys or set SSHKEY_SRC=/path/to/key.pub"
+  exit 1
+fi
+
+# Take first valid ssh key line (ssh-rsa / ssh-ed25519 / ecdsa)
+awk '/^(ssh-rsa|ssh-ed25519|ecdsa-sha2-nistp256) /{print; exit}' "$SSHKEY_SRC" > "$TMP_PUBKEY" || true
+if [[ ! -s "$TMP_PUBKEY" ]]; then
+  echo "ERROR: No SSH public key found in $SSHKEY_SRC"
+  exit 1
+fi
+
+echo "==> Downloading Debian 13 cloud image (if missing)"
+mkdir -p "$IMG_DIR"
+if [[ ! -f "$IMG_DIR/$IMG_FILE" ]]; then
+  wget -O "$IMG_DIR/$IMG_FILE" "$IMG_URL"
+else
+  echo "    Image already exists: $IMG_DIR/$IMG_FILE"
+fi
+
+echo "==> Creating VM $VMID ($NAME)"
+# If VM exists, abort to avoid overwriting
+if qm status "$VMID" >/dev/null 2>&1; then
+  echo "ERROR: VMID $VMID already exists. Choose another VMID (export VMID=xxxx)."
+  exit 1
+fi
+
+qm create "$VMID" \
+  --name "$NAME" \
+  --memory "$MEMORY" \
+  --cores "$CORES" \
+  --net0 "virtio,bridge=${BRIDGE}"
+
+echo "==> Importing disk into storage: $STORAGE"
+qm importdisk "$VMID" "$IMG_DIR/$IMG_FILE" "$STORAGE"
+
+echo "==> Attaching disk + enabling cloud-init"
+qm set "$VMID" --scsihw virtio-scsi-pci
+
+# Most storages name the imported disk as vm-<VMID>-disk-0
+# Attach it as scsi0:
+qm set "$VMID" --scsi0 "${STORAGE}:vm-${VMID}-disk-0"
+
+# Cloud-init drive:
+qm set "$VMID" --ide2 "${STORAGE}:cloudinit"
+
+echo "==> Boot + console + QEMU agent"
+qm set "$VMID" --boot order=scsi0
+qm set "$VMID" --serial0 socket --vga serial0
+qm set "$VMID" --agent enabled=1
+
+echo "==> Cloud-init parameters (user/ssh/network)"
+qm set "$VMID" --ciuser "$CIUSER"
+qm set "$VMID" --sshkeys "$TMP_PUBKEY"
+qm set "$VMID" --ipconfig0 ip=dhcp
+
+echo "==> Resizing disk to $DISK_SIZE"
+qm resize "$VMID" scsi0 "$DISK_SIZE"
+
+echo "==> Converting VM to template"
+qm template "$VMID"
+
+echo "✅ DONE: Debian 13 template created"
+echo "   VMID: $VMID"
+echo "   Name: $NAME"
+echo "   Storage: $STORAGE"
+echo "   Next: qm clone $VMID <NEWID> --name debian13-vps --full"