Enable VNC (TightVNC) on Xubuntu 16.04
Update (2019/Feb/02)
If you want to install TightVNC on Ubuntu 18.04 I recommend to use my tutorial for Lxde and Ubuntu 18.04 on Github.com/.../myvnc
Install TightVNC Server
apt-get install tightvncserver
Configure xstartup
Edit file ~/.vnc/xstartup
#!/bin/sh
xrdb $HOME/.Xresources
xsetroot -solid grey
startxfce4 &
Try running it
tightvncserver :10 -geometry 1152x864
Note: You should run it on screen 10 instead of 1 because screen 1 is used by XServer
Connect: xtightvncviewer server_hostname:5910
Kill it: tightvncserver -kill :10
Install TightVNC Server as Systemd service
Create /lib/systemd/system/tightvnc.service
[Unit]
Description=TightVNC Service
[Service]
Type=forking
ExecStart=/usr/bin/sudo -u your_username /usr/bin/tightvncserver :10 -geometry 1152x864
ExecStop=/usr/bin/sudo -u your_username /usr/bin/tightvncserver -kill :10
Start service: systemctl start tightvnc.service
Enable service: systemctl enable tightvnc.service