install desktop

apt update
apt install --no-install-recommends ubuntu-desktop nano

install vnc server

apt install gnome-panel gnome-settings-daemon metacity nautilus gnome-terminal
apt install dbus-x11
apt install tightvncserver

init and set password

mkdir ~/.Xresources
export USER=root
vncserver :0

list and kill

ps uax | grep vnc
vncserver -kill :0

config vnc server

mv ~/.vnc/xstartup ~/.vnc/xstartup.bak
nano ~/.vnc/xstartup

#!/bin/bash

export $(dbus-launch) 
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
export XKL_XMODMAP_DISABLE=1
export XDG_CURRENT_DESKTOP="GNOME-Flashback:GNOME"
export XDG_MENU_PREFIX="gnome-flashback-"
xrdb $HOME/.Xresources
gnome-panel &
gnome-settings-daemon &
metacity &
nautilus &
gnome-terminal &

chmod +x ~/.vnc/xstartup

set password

vncpasswd :0

start

export USER=root
vncserver :0

access

vnc://ip:5900