diff --git a/pkg/de-p1st-installer/de-p1st-installer.sh b/pkg/de-p1st-installer/de-p1st-installer.sh
index fd85f09..709d628 100755
--- a/pkg/de-p1st-installer/de-p1st-installer.sh
+++ b/pkg/de-p1st-installer/de-p1st-installer.sh
@@ -276,6 +276,19 @@ ff02::2       ip6-allrouters" >> /mnt/etc/hosts || return $?
   fi
 }
 
+function user_and_pwd() {
+  # -m: create home
+  # -U: Create a group with the same name as the user, and add the user to this group.
+  arch-chroot /mnt useradd -m -s /usr/bin/zsh -g wheel "${USERNAME}" || return $?
+  arch-chroot /mnt chsh       -s /usr/bin/zsh                        || return $?
+
+  # If ROOT_PWD is not given, the use USER_PWD for root user
+  ROOT_PWD="${ROOT_PWD:="${USER_PWD}"}"
+
+  printf "%s:%s" "${USERNAME}" "${USER_PWD}" | chpasswd --root /mnt || return $?
+  printf "%s:%s" "root"        "${ROOT_PWD}" | chpasswd --root /mnt || return $?
+}
+
 function main() {
   # @pre
   #   bash libraries imported
@@ -322,6 +335,7 @@ function main() {
   # in: HOSTNAME, FQDN (optional), STATIC_IP (optional), IPV6_CAPABLE (optional)
   config_hostname_and_hosts || return $?
 
+  user_and_pwd || return $?
 }
 
 main "$@"
diff --git a/pkg/de-p1st-installer/installer.cfg b/pkg/de-p1st-installer/installer.cfg
index 311cd98..1ed1665 100644
--- a/pkg/de-p1st-installer/installer.cfg
+++ b/pkg/de-p1st-installer/installer.cfg
@@ -11,6 +11,9 @@ USERNAME=arch
 USER_PWD=test
 LUKS_PWD=test
 
+# if unset, then USER_PWD will be used for ROOT_PWD
+# ROOT_PWD=test
+
 KERNEL=linux
 
 TARGET_BLOCK_DEVICE=/dev/sda