预安装 18.04.2 后系统目录不属于 root

Question

我遇到了一个问题，在 Ubuntu 18.04.2 上使用 preseed 进行无人值守安装后，没有 root 拥有的文件。我在无法使用 sudo 时发现了这个问题。经过调查，我发现 /usr、/lib 和 /home 归 1001:1001 所有，而不是 root，任何文件或子目录也是如此。这在过去不是问题，所以我有点困惑。请参阅下面的预置文件：

# Localization
d-i debian-installer/locale             string  en_US.UTF-8
d-i debian-installer/language           string  en
d-i debian-installer/country            string US

# Keyboard layout
d-i console-setup/ask_detect            boolean false
d-i keyboard-configuration/layoutcode   string  us
d-i keyboard-configuration/charmap      select  UTF-8
d-i keyboard-configuration/layout       string English (US)


### Network configuration
d-i netcfg/choose_interface             select auto
d-i netcfg/use_autoconfig               boolean true
d-i netcfg/get_domain                   string cg.chrysler.com

### Mirror settings
d-i mirror/country                      string  manual
d-i mirror/http/hostname                string  us.archive.ubuntu.com
d-i mirror/http/directory               string  /ubuntu
d-i mirror/http/proxy                   string  
d-i proxy                               string  
d-i mirror/protocol                     string  http

### Account setup
d-i passwd/user-fullname                string ictadmin
d-i passwd/username                     string ictadmin
d-i passwd/user-password                password chrysler1
d-i passwd/user-password-again          password chrysler1
d-i user-setup/encrypt-home             boolean false

### Clock and time zone setup - TS verified ntp server 
d-i clock-setup/utc                     boolean true
d-i time/zone                           string  America/Detroit
d-i clock-setup/ntp                     boolean false
d-i clock-setup/ntp-server             string  ntp.example.com 

# Automatically detect device name of install disk
d-i partman/early_command   string      debconf-set partman-auto/disk /dev/"$(fdisk -l |grep -i linux | awk '{print $1}' | cut -d / -f 3 |sed 's/p[0-9]$//p' |head -n1)"

### Partitioning and disk encryption
d-i partman-auto/method                 string  crypto
d-i partman-crypto/passphrase             password 
d-i partman-crypto/passphrase-again       password 

d-i partman-lvm/purge_lv_from_device    boolean true
d-i partman-lvm/device_remove_lvm       boolean true
d-i partman-md/device_remove_md         boolean true
d-i partman-lvm/confirm                boolean true
d-i partman-lvm/confirm_nooverwrite    boolean true
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-lvm/confirm_nooverwrite    boolean true

### Package selection
tasksel tasksel/first                   multiselect ubuntu-desktop
ubiquity    ubiquity/keep-installed string icedtea6-plugin openoffice.org
# Enable extras.ubuntu.com.
d-i apt-setup/extras    boolean true
d-i pkgsel/include/install-recommends   boolean true

### Boot loader installation
d-i grub-installer/only_debian          boolean true##  TO DO:  Resolve how to create more file systems
##  Need to have OS separated from data
d-i grub-installer/with_other_os        boolean true



### Copy and install some extra stuff

### When ubiquity/success_command is invoked /target is mounted

ubiquity ubiquity/success_command       string \
   in-target apt purge gdm3 ; \
   in-target apt update ; \
   in-target apt-get -y install net-tools libwebkitgtk-3.0 terminator gdm3 ; \
   in-target hostname `echo "ubn"$(lshw | grep -m 1 serial | awk '{print tolower ($2)}')` ; \
   hostname > /target/etc/hostname ; \
   sed -i "2s/.*/127.0.1.1\t$(cat /target/etc/hostname)/" /target/etc/hosts

ubiquity ubiquity/use_nonfree   boolean true
ubiquity ubiquity/reboot   boolean  true