david@David-Laptop:~$ vncserver

Warning: David-Laptop:4 is not taken because of /tmp/.X4-lock
Remove this file if there is no X server David-Laptop:4

New 'X' desktop is David-Laptop:5

Starting applications specified in /etc/X11/Xsession
Log file is /home/david/.vnc/David-Laptop:5.log