anchor.diff:  d-i     netcfg/confirm_static   boolean true
   
   d-i     partman/early_command string \
  -udevadm trigger; udevadm settle --timeout=30 \
  +sleep 10 ; umount /media || /bin/true ;\
  +udevadm trigger; udevadm settle --timeout=30 ;\
   for d in $(ls /dev/sd[a-z]); do \
  -dd if=/dev/zero of=$d bs=4M count=16 || echo "Write to $d failed" \
  +dd if=/dev/zero of=$d bs=4M count=16 || echo "Write to $d failed" ;\
   done
   d-i     partman-auto/disk string /dev/sda
   d-i     partman-auto/method string regular
  
positive.code: 
  d-i     debian-installer/locale string en_US.UTF-8
  d-i     debian-installer/splash boolean false
  d-i     console-setup/ask_detect        boolean false
  d-i     console-setup/layoutcode        string us
  d-i     console-setup/variantcode       string
  
negative.code: 
  d-i     preseed/late_command string true && \
          in-target dpkg --remove-architecture i386 ;\
          in-target sed -i -e "s/^deb-src/\# deb-src/g" /etc/apt/sources.list ;\
          in-target apt-get update ;\
          in-target apt-get -y install kexec-tools ;\
          in-target sed -i -e "s/^LOAD_KEXEC=.*$/LOAD_KEXEC=true/" /etc/default/kexec ;\
          in-target sed -i -e "s/^USE_GRUB_CONFIG=.*$/USE_GRUB_CONFIG=true/" /etc/default/kexec ;\
  