Security risks arise if multiple servers share the same host keys.
: Remove persistent udev rules (usually in /etc/udev/rules.d/70-persistent-net.rules ) and clear specific MAC address entries from network configuration files.
: Primarily for Linux guests on KVM/QEMU and oVirt environments. Unix & Linux Stack Exchange +4 📋 Manual "Sealing" Checklist If you aren't using a tool, you must manually clear specific files to prevent conflicts like duplicate IDs or network errors: Category Action Key Files/Commands Identification Clear unique system IDs > /etc/machine-id Networking Remove hardware-specific rules rm /etc/udev/rules.d/70-persistent-net.rules Security Regenerate identity on first boot rm /etc/ssh/ssh_host_* Logs Clear history and logs > /var/log/lastlog
preserve_hostname: false manage_etc_hosts: true ssh_pwauth: false disable_root: false