Linux?
service x11vnc
{
port = 5900
type = UNLISTED
socket_type = stream
protocol = tcp
wait = no
user = root
server = /usr/bin/x11vnc
server_args = -inetd -o /var/log/x11vnc.log -display :1 -auth /var/run/lightdm/root/:1 -rfbauth /etc/x11vnc.passwd -many -bg
disable = no
}
sudo /etc/init.d/xinetd restart