Danke für den Hinweis. Ich werde die Apt-Optionen mal in in verschiedenen Kombinationen ausprobieren.
Meine Preseed-Datei sieht so aus:
# Locale
d-i debian-installer/locale string en_US
# country and keyboard settings are automatic. Keep them ...
# ... for wheezy and newer:
d-i keyboard-configuration/xkb-keymap seen true
# ... for squeeze and older:
d-i console-keymaps-at/keymap seen true
# Network configuration
d-i netcfg/choose_interface select auto
d-i netcfg/get_hostname string ubuntu-test.test.com
d-i netcfg/get_domain string test.com
d-i netcfg/wireless_wep string
d-i hw-detect/load_firmware boolean true
# Mirror settings
d-i mirror/country string manual
d-i mirror/http/hostname string mirros.test.com:80
d-i mirror/http/directory string /ubuntu
d-i mirror/http/proxy string
d-i mirror/codename string trusty
d-i mirror/suite string trusty
d-i mirror/udeb/suite string trusty
# Time settings
d-i clock-setup/utc boolean true
d-i time/zone string UTC
# NTP
d-i clock-setup/ntp boolean true
d-i clock-setup/ntp-server string 0.debian.pool.ntp.org
# Set alignment for automatic partitioning
# Choices: cylinder, minimal, optimal
#d-i partman/alignment select cylinder
d-i partman-auto/disk string /dev/sda /dev/vda /dev/xvda
### Partitioning
# The presently available methods are: "regular", "lvm" and "crypto"
d-i partman-auto/method string regular
# If one of the disks that are going to be automatically partitioned
# contains an old LVM configuration, the user will normally receive a
# warning. This can be preseeded away...
d-i partman-lvm/device_remove_lvm boolean true
# The same applies to pre-existing software RAID array:
d-i partman-md/device_remove_md boolean true
# And the same goes for the confirmation to write the lvm partitions.
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
# You can choose one of the three predefined partitioning recipes:
# - atomic: all files in one partition
# - home: separate /home partition
# - multi: separate /home, /usr, /var, and /tmp partitions
d-i partman-auto/choose_recipe select atomic
# If you just want to change the default filesystem from ext3 to something
# else, you can do that without providing a full recipe.
# This makes partman automatically partition without confirmation, provided
# that you told it what to do using one of the methods above.
d-i partman/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
# Install different kernel
#d-i base-installer/kernel/image string linux-server
# User settings
d-i passwd/root-password-crypted password test
user-setup-udeb passwd/root-login boolean false
d-i passwd passwd/make-user boolean false
user-setup-udeb passwd/make-user boolean false
# Install minimal task set (see tasksel --task-packages minimal)
tasksel tasksel/first multiselect minimal, ssh-server, openssh-server
# Install some base packages
d-i pkgsel/include string puppet lsb-release
d-i pkgsel/update-policy select unattended-upgrades
popularity-contest popularity-contest/participate boolean false
# Boot loader settings
#grub-pc grub-pc/hidden_timeout boolean false
#grub-pc grub-pc/timeout string 10
d-i grub-installer/only_debian boolean true
d-i grub-installer/with_other_os boolean true
d-i finish-install/reboot_in_progress note
d-i preseed/late_command string wget -Y off http://test.test.com/unattended/finish?token=64694842-e117-41e8-9e05-6939402a924c -O /target/tmp/finish.sh && in-target chmod +x /tmp/finish.sh && in-target /tmp/finish.sh