[Unit]
Description=VNC Server
After=multi-user.target network.target

[Service]
Restart=always
# Run "x11vnc -storepasswd /etc/X11/vnc.pass" before first use
ExecStart=/usr/bin/x11vnc -auth /var/run/lightdm/root/:0 -xkb -forever -display :0 -rfbauth /etc/X11/vnc.pass -rfbport 5900 -o /dev/shm/x11vnc.log
ExecStop=/usr/bin/killall x11vnc

[Install]
WantedBy=multi-user.target