Topic: preseed

• Debian preseed and Ubuntu autoinstall: two automated-install formats, not interchangeable

  Debian's installer is automated with a preseed file that answers debconf questions, while Ubuntu Server (20.04+) and Desktop (23.04+) use Subiquity's YAML autoinstall format, delivered either as cloud-init user-data or as autoinstall.yaml on the install media. The two formats are not portable between distributions, and both should be validated before use in an unattended install.

  article · en · reviewed · knowledge as of 2026-09-24

Machine-readable: JSON