Get X11VNC working on bootup in Ubuntu

Here are the steps I used to get X11VNC working on an Ubuntu (19.10) box. Hope this helps somebody else out there too.

1. Install x11vnc using something like sudo apt install x11vnc
2. Create a password to access X11VNC and store it in the /etc/ directory.
   sudo x11vnc -storepasswd /etc/x11vnc.pass
3. Here's a tricky/dodgy bit from a security point of view. You will need to assign appropriate permissions to this x11vnc.pass file. For my local needs I just set it to readable by all using sudo chmod a+r /etc/x11vnc.pass . You might want to tweak this according to your needs.
4. Create a service that will run on bootup:
   • sudo vi /etc/systemd/system/x11vnc.service
   • Add the following to the file:
     

     [Unit]
     Description=x11vnc remote desktop server
     After=multi-user.target
     
     [Service]
     Type=simple
     ExecStart=/usr/bin/x11vnc -auth guess -forever -loop -noxdamage -repeat -rfbauth /etc/x11vnc.pass -rfbport 5900 -shared
     
     Restart=on-failure
     
     [Install]
     WantedBy=multi-user.target

5. Now enable and start the new service using the following commands:
6. sudo systemctl enable x11vnc.service
7. sudo systemctl daemon-reload
8. sudo systemctl start x11vnc

Check to see if it works and restart your box to double check. I was able to VNC in even when my Xubuntu box was at the login screen. Good luck!