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In order to configure the VNC server, the TigerVNC chapter in the System Administrator's Guide for Red Hat Enterprise Linux advises to set the password for the user by typing the following at a shell prompt as root:

  # vncpasswd user

This is incorrect, because the vncpasswd command does not accept a username as an argument and in this particular case, creates a file named "user" in the home directory of the root user. As a consequence, any attempt to start the VNC server fails with an error. The correct procedure is to log in as the user and run the vncpasswd command without any arguments:

  # su - user
  $ vncpasswd

Hello

thank you for taking the time to raise this bug.

This is now fixed and change now live in:

Red_Hat_Enterprise_Linux-System_Administrators_Guide-7-web-en-US-0.12-0.6.el6eng

Revision 0.12-0.6	Tue Nov 18 2014	Stephen Wadeley
Improved TigerVNC. 

Regards
Stephen