preseed.cfg

d-i passwd/user-fullname string default
d-i passwd/username string vagrant
d-i passwd/user-password password vagrant
d-i passwd/user-password-again password vagrant
d-i passwd/user-default-groups string audio cdrom video sudo

d-i time/zone string GMT

d-i partman-auto/method string regular
d-i partman-auto/choose_recipe select atomic
d-i partman-partitioning/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

d-i apt-setup/cdrom/set-first boolean false
d-i apt-setup/non-free boolean true
d-i apt-setup/contrib boolean true

d-i mirror/country string manual
d-i mirror/http/hostname string deb.debian.org
d-i mirror/http/directory string /debian
d-i mirror/http/proxy string

popularity-contest popularity-contest/participate boolean false

tasksel tasksel/first multiselect standard, ssh-server
d-i pkgsel/include string sudo

d-i grub-installer/bootdev string /dev/sda
d-i finish-install/reboot_in_progress note