Update

README.md

@@ -32,11 +32,11 @@ This script is written to reinstall a VPS/virtual machine to Debian 10 Buster.
 
 ## Available Options
 
- * `--ip <string>` Static public/private IP, e.g. `10.0.0.2`
- * `--netmask <string>` e.g. `255.255.255.0` /  `ffff:ffff:ffff:ffff::`. Ignored if `--ip` is not specified
- * `--gateway <string>` e.g. `10.0.0.1`. Ignored if `--ip` is not specified
- * `--dns '8.8.8.8 8.8.4.4'` Quoted string where IP addresses are seperated by spaces. Ignored if `--ip` is not specified
- * `--hostname debian`
+ * `--ip <string>` Disable the auto network config (DHCP) and set a static public/private IP address, e.g. `10.0.0.2`
+ * `--netmask <string>` Subnet mask of the static public/private IP address, e.g. (IPv4) `255.255.255.0` (IPv6) `ffff:ffff:ffff:ffff::`
+ * `--gateway <string>` e.g. `10.0.0.1`
+ * `--dns '8.8.8.8 8.8.4.4'`
+ * `--hostname <string>` FQDN hostname (includes the domain name), e.g. `server1.example.com`
  * `--network-console` Enable the network console of the installer. `ssh installer@ip` to connect
  * `--suite buster`
  * `--mirror-protocol http` or `https` or `ftp`
@@ -60,7 +60,7 @@ This script is written to reinstall a VPS/virtual machine to Debian 10 Buster.
  * `--kernel <string>` Choose an package for the kernel image
  * `--cloud-kernel` Choose `linux-image-cloud-amd64` as the kernel image
  * `--no-install-recommends`
- * `--install 'ca-certificates libpam-systemd'` Additional packages to install. Quoted string where package names are seperated by spaces. Package names specified here will override the default list, rather than append to it
+ * `--install 'ca-certificates libpam-systemd'`
  * `--safe-upgrade` **(Default)** `apt upgrade --with-new-pkgs`. [See](https://salsa.debian.org/installer-team/pkgsel/-/blob/master/debian/postinst)
  * `--full-upgrade` `apt dist-upgrade`
  * `--no-upgrade` 

debi.sh

@@ -250,6 +250,10 @@ done
 installer="debian-$suite"
 installer_directory="/boot/$installer"
 
+while [ -z "$password" ]; do
+    prompt_password
+done
+
 save_preseed='cat'
 if [ "$dry_run" != true ]; then
     [ "$(id -u)" -ne 0 ] && err 'root privilege is required'
@@ -276,25 +280,32 @@ if [ -n "$ip" ]; then
     echo 'd-i netcfg/disable_autoconfig boolean true' | $save_preseed
     echo "d-i netcfg/get_ipaddress string $ip" | $save_preseed
     [ -n "$netmask" ] && echo "d-i netcfg/get_netmask string $netmask" | $save_preseed
-    [ -n "$gateway" ] && echo "d-i netcfg/get_gateway string $gateway" | $save_preseed
-    [ -n "$dns" ] && echo "d-i netcfg/get_nameservers string $dns" | $save_preseed
     echo 'd-i netcfg/confirm_static boolean true' | $save_preseed
 fi
 
-$save_preseed << 'EOF'
-d-i netcfg/get_hostname string debian
-d-i netcfg/get_domain string
-EOF
+[ -n "$gateway" ] && echo "d-i netcfg/get_gateway string $gateway" | $save_preseed
+[ -n "$dns" ] && echo "d-i netcfg/get_nameservers string $dns" | $save_preseed
 
 if [ -n "$hostname" ]; then
     echo "d-i netcfg/hostname string $hostname" | $save_preseed
+    hostname=debian
+    domain=
+else
+    hostname=$(cat /proc/sys/kernel/hostname)
+    domain=$(cat /proc/sys/kernel/domainname)
+    if [ "$domain" = '(none)' ]; then
+        domain=
+    else
+        domain=" $domain"
+    fi
 fi
 
-echo 'd-i hw-detect/load_firmware boolean true' | $save_preseed
+$save_preseed << EOF
+d-i netcfg/get_hostname string $hostname
+d-i netcfg/get_domain string$domain
+EOF
 
-while [ -z "$password" ]; do
-    prompt_password
-done
+echo 'd-i hw-detect/load_firmware boolean true' | $save_preseed
 
 if [ "$network_console" = true ]; then
     $save_preseed << EOF