fixed:

xorriso
 zscaler
 first_install
 hostname
added:
  qemu script
  timzone
  realname
disabled systemd-networkd-wait-online

templates/user-data.tmpl

@@ -1,6 +1,7 @@
 #cloud-config
 autoinstall:
   version: 1
+  timezone: Europe/Budapest
 
   # Network configuration – Ethernet + optional Wi‑Fi
   network:
@@ -14,8 +15,9 @@ autoinstall:
 
   # ─── IDENTITY ──────────────────────────────────────────────────────────────
   identity:
-    hostname: nokia
+    hostname: nokia-l13g4-sisu
     username: alfoldi
+    realname: "Zsolt Alfoldi"
     password: "${USER_PASSWORD_HASH}"
 
   # ─── SSH ───────────────────────────────────────────────────────────────────
@@ -66,6 +68,17 @@ autoinstall:
         encoding: b64
         content: "${NOKIA_CLIENT_KEY_B64}"
 
+      - path: /home/${TARGET_USER}/first_install.sh
+        permissions: "0755"
+        owner: ${TARGET_USER}:${TARGET_USER}
+        content: |
+          if [[ $EUID -ne 0 ]]; then
+            echo "This script must be run as root"
+            exit 1
+          fi
+          chown ${TARGET_USER}:${TARGET_USER} -R /home/${TARGET_USER}/nocloud/
+          bash -x /home/${TARGET_USER}/nocloud/post-install.sh main
+
       # - path: /etc/himmelblau/himmelblau.conf
       #   owner: ${TARGET_USER}:${TARGET_USER}
       #   content: |
@@ -178,7 +191,7 @@ autoinstall:
     - bash -x /cdrom/nocloud/wifi.sh
     - mkdir -p /target/home/${TARGET_USER}/nocloud
     - cp /cdrom/nocloud/* /target/home/${TARGET_USER}/nocloud/
-    - chown ${TARGET_USER}:${TARGET_USER} -R /target/home/${TARGET_USER}/nocloud/
+    - curtin in-target -- systemctl disable systemd-networkd-wait-online.service
 
   updates: all
   shutdown: poweroff