CentOS 7.0 - man page for vncpasswd (centos section 1)

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vncpasswd(1)			    Virtual Network Computing			     vncpasswd(1)

       vncpasswd - change the VNC password

       vncpasswd [passwd-file]
       vncpasswd -f

       vncpasswd  allows you to set the password used to access VNC desktops.  Its default behav-
       ior is to prompt for a VNC password and then store an obfuscated version of this  password
       to  passwd-file (or to $HOME/.vnc/passwd if no password file is specified.)  The vncserver
       script runs vncpasswd the first time you start a VNC desktop, and it invokes Xvnc with the
       appropriate  -rfbauth  option.  vncviewer can also be given a password file to use via the
       -passwd option.

       The password must be at least six characters long (unless the -f  command-line  option  is
       used--  see  below),  and  only the first eight characters are significant.  Note that the
       stored password is not encrypted securely - anyone who has access to this file  can  triv-
       ially  find  out the plain-text password, so vncpasswd always sets appropriate permissions
       (read and write only by the owner.)  However, when accessing a VNC desktop,  a  challenge-
       response  mechanism  is used over the wire making it hard for anyone to crack the password
       simply by snooping on the network.

       -f     Filter mode.  Read a plain-text password from stdin and write an encrypted  version
	      to  stdout.   Note  that	in  filter  mode,  short  or even empty passwords will be
	      silently accepted.

	      Default location of the VNC password file.

       vncviewer(1), vncserver(1), Xvnc(1) vncconfig(1),

       Tristan Richardson, RealVNC Ltd.
       Antoine Martin
       D. R. Commander

       VNC was originally developed by the RealVNC team while at Olivetti  Research  Ltd  /  AT&T
       Laboratories Cambridge.	TightVNC additions were implemented by Constantin Kaplinsky. Many
       other people participated in development, testing and support.

TigerVNC				   09 Jul 2010				     vncpasswd(1)
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