使用自动分区，标准分区方式：
#d-i partman-auto/disk string /dev/sda
#选择第一个硬盘
d-i partman/early_command string debconf-set partman-auto/disk "$(list-devices disk | head -n1)"
d-i partman-auto/choose_recipe select atomic
d-i partman-auto/method string regular
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
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 partman/default_filesystem string ext4
d-i partman/mount_style select uuid
自动LVM分区：
d-i partman-auto/disk string /dev/sda
d-i partman-auto/choose_recipe select atomic
d-i partman-auto/method string lvm
d-i partman-auto-lvm/guided_size string 100%
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
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 partman/default_filesystem string ext4
d-i partman/mount_style select uuid
使用自定义标准分区方案，第一个数字为最小分区大小（MB），第二个获取最大分区的优先级（越小优先级越高），第三个最大分区大小。
d-i partman-auto/disk string /dev/sda
d-i partman-auto/choose_recipe select boot-root
d-i partman-auto/method string regular
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-auto/expert_recipe string \
boot-root :: \
5120 1 5120 ext4 \
$primary{ } $bootable{ } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ /} \
. \
1 3 -1 ext4 \
$primary{ } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ /home} \
. \
1024 2 1024 linux-swap \
$primary{ } \
method{ swap } format{ } \
.
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 partman/default_filesystem string ext4
d-i partman/mount_style select uuid
使用自定义分区LVM：
d-i partman-auto/disk string /dev/sda
d-i partman-auto/choose_recipe select boot-lvm
d-i partman-auto/method string lvm
d-i partman-auto-lvm/guided_size string 100%
d-i partman-auto-lvm/new_vg_name string vg00
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-auto/expert_recipe string \
boot-lvm :: \
1024 1 1024 ext4 \
$primary{ } $bootable{ } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ /boot } \
. \
1 2 -1 ext4 \
$primary{ } \
$defaultignore{ } \
method{ lvm } \
device{ /dev/sda } \
vg_name{ vg00 } \
. \
1024 3 1024 swap \
$lvmok{ } lv_name{ lv_swap } in_vg{ vg00 } \
method{ swap } format{ } \
. \
1 4 -1 ext4 \
$lvmok{} lv_name{ lv_root } in_vg{ vg00 } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ / } \
.
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
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 partman/default_filesystem string ext4
d-i partman/mount_style select uuid
通过preseed自动安装ubuntu系统详细配置文件见：https://www.haiyun.me/archives/1246.html
参考：
https://stackoverflow.com/questions/33923952/ubuntu-14-04-preseed-lvm-disk-config
https://cptyesterday.wordpress.com/2012/06/17/notes-on-using-expert_recipe-in-debianubuntu-preseed-files/
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