Problem with following directions for multi-user VNC server setup

Question

While following the steps described at this answered question (ubuntu 14.10 multiple Simultaneous independent remote (desktop like ) connections), I am unable to complete Step 8 it seems -

sudo update-rc.d vncserver defaults 99

I get this message:

adam@server:/etc/init.d$ sudo `update-rc.d vncserver defaults 99`
==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
Authentication is required to reload the systemd state.
Multiple identities can be used for authentication:
 [...omitted for privacy]
Choose identity to authenticate as (1-2): 1
Password: 
==== AUTHENTICATION COMPLETE ===
usage: sudo -h | -K | -k | -V
usage: sudo -v [-AknS] [-g group] [-h host] [-p prompt] [-u user]
usage: sudo -l [-AknS] [-g group] [-h host] [-p prompt] [-U user] [-u user] [command]
usage: sudo [-AbEHknPS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p prompt] [-u user] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p prompt] [-u user] file ...

When I reboot, the VNC server is not running. Any thoughts? I followed all of the other instructions verbatim.

Thanks!

Adam