1vncpasswd(1)               Virtual Network Computing              vncpasswd(1)
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NAME

6       vncpasswd - change the VNC password
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SYNOPSIS

9       vncpasswd [passwd-file]
10       vncpasswd -f
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DESCRIPTION

13       vncpasswd  allows  you to set the password used to access VNC desktops.
14       Its default behavior is to prompt for a VNC password and then store  an
15       obfuscated   version   of   this   password   to   passwd-file  (or  to
16       $HOME/.vnc/passwd if no password file  is  specified.)   The  vncserver
17       script  runs  vncpasswd  the first time you start a VNC desktop, and it
18       invokes Xvnc with the appropriate -rfbauth option.  vncviewer can  also
19       be given a password file to use via the -passwd option.
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21       The  password  must be at least six characters long (unless the -f com‐
22       mand-line option is used-- see below), and only the first eight charac‐
23       ters  are  significant.  Note that the stored password is not encrypted
24       securely - anyone who has access to this file can  trivially  find  out
25       the  plain-text  password, so vncpasswd always sets appropriate permis‐
26       sions (read and write only by the owner.)  However,  when  accessing  a
27       VNC  desktop, a challenge-response mechanism is used over the wire mak‐
28       ing it hard for anyone to crack the password simply by snooping on  the
29       network.
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OPTIONS

33       -f     Filter mode.  Read a plain-text password from stdin and write an
34              encrypted version to stdout.  Note that in filter mode, short or
35              even empty passwords will be silently accepted.
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37              A  view-only password must be separated from the normal password
38              by a newline character.
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FILES

43       $HOME/.vnc/passwd
44              Default location of the VNC password file.
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SEE ALSO

48       vncviewer(1), vncserver(1), Xvnc(1) vncconfig(1),
49       https://www.tigervnc.org
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AUTHORS

53       Tristan Richardson, RealVNC Ltd., Antoine Martin, D. R.  Commander  and
54       others.
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56       VNC  was  originally  developed  by  the RealVNC team while at Olivetti
57       Research Ltd / AT&T Laboratories Cambridge.   TightVNC  additions  were
58       implemented  by Constantin Kaplinsky. Many other people have since par‐
59       ticipated in development, testing and support. This manual is  part  of
60       the TigerVNC software suite.
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64TigerVNC                                                          vncpasswd(1)
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