vnc4server -V (return code: -15)
You will require a password to access your desktops.
vnc4server --help (return code: 255)
VNC4 server
Usage: vnc4server [<OPTIONS>] [:<DISPLAY#>]
vnc4server -kill :<DISPLAY#>
<OPTIONS> are Xvnc4 options, or:
-name <DESKTOP-NAME>
-depth <DEPTH>
-geometry <WIDTH>x<HEIGHT>
-httpport number
-basehttpport number
-alwaysshared
-nevershared
-pixelformat rgb<NNN>
-pixelformat bgr<NNN>
<Xvnc4-options>...
See vnc4server and Xvnc4 manual pages for more information.