* **Clear Machine ID:** Prevents DHCP IP lease conflicts on local networks. ```bash truncate -s 0 /etc/machine-id rm -f /var/lib/dbus/machine-id ln -s /etc/machine-id /var/lib/dbus/machine-id Removes historical operational data. find /var/log -type f -exec truncate -s 0 {} \; Use code with caution.

This allows testing cloud-init behavior without a real metadata service.

cloud-init is the soul of the Ubuntu cloud image. It runs on every boot (first boot only, unless re-triggered) and performs: