| .TH vncpasswd 1 "05 May 2006" "TightVNC" "Virtual Network Computing" |
| .SH NAME |
| vncpasswd \- change a VNC password |
| .SH SYNOPSIS |
| .B vncpasswd |
| .RI [ passwd-file ] |
| .SH DESCRIPTION |
| .B vncpasswd |
| allows you to set the password used to access VNC desktops. It stores an |
| obfuscated version of the password in the given file (default |
| $HOME/.vnc/passwd). The \fBvncserver\fP script runs \fBvncpasswd\fP the first |
| time you start a VNC desktop, and invokes \fBXvnc\fP with the appropriate |
| \fB\-rfbauth\fP option. \fBvncviewer\fP can also be given a password file to |
| use via the \fB\-passwd\fP option. |
| |
| The password must be at least six characters long, and only the first eight |
| characters are significant. Note that the stored password is \fBnot\fP |
| encrypted securely - anyone who has access to this file can trivially find out |
| the plaintext password, so \fBvncpasswd\fP 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. |
| |
| .SH FILES |
| .TP |
| $HOME/.vnc/passwd |
| Default location of the VNC password file. |
| |
| .SH SEE ALSO |
| .BR vncviewer (1), |
| .BR vncserver (1), |
| .BR Xvnc (1) |
| .BR vncconfig (1), |
| .br |
| http://www.tightvnc.com |
| |
| .SH AUTHOR |
| Tristan Richardson, RealVNC Ltd. |
| |
| VNC was originally developed by the RealVNC team while at Olivetti |
| Research Ltd / AT&T Laboratories Cambridge. TightVNC additions was |
| implemented by Constantin Kaplinsky. Many other people participated in |
| development, testing and support. |