Section: Virtual Network Computing (1)
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vncpasswd - change the VNC password
allows you to set the password used to access VNC desktops. Its default
behavior 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
time you start a VNC desktop, and it invokes Xvnc
with the appropriate
can also be given a password file to
use via the -passwd
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 trivially 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.
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.
A view-only password must be separated from the normal password by a newline
Default location of the VNC password file.
Tristan Richardson, RealVNC Ltd., Antoine Martin, D. R. Commander and others.
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 have since
participated in development, testing and support. This manual is part
of the TigerVNC software suite.