.TH vncserver 1 "" "TigerVNC" "Virtual Network Computing"

.SH NAME

vncserver \- start or stop a VNC server

.SH SYNOPSIS

.B vncserver

.RI [: display# ]

.RB [ \-name

.IR desktop-name ]

.RB [ \-geometry

.IR width x height ]

.RB [ \-depth

.IR depth ]

.RB [ \-pixelformat

.IR format ]

.RB [ \-fp

.IR font-path ]

.RB [ \-fg ]

.RB [ \-autokill ]

.RB [ \-noxstartup ]

.RB [ \-xstartup

.IR script ]

.RI [ Xvnc-options... ]

.br

.BI "vncserver \-kill :" display#

.br

.BI "vncserver \-list"

.SH DESCRIPTION

.B vncserver

is used to start a VNC (Virtual Network Computing) desktop.

.B vncserver

is a Perl script which simplifies the process of starting an Xvnc server.  It

runs Xvnc with appropriate options and starts a window manager on the VNC

desktop.

.B vncserver

can be run with no options at all. In this case it will choose the first

available display number (usually :1), start Xvnc with that display number,

and start the default window manager in the Xvnc session.  You can also

specify the display number, in which case vncserver will attempt to start

Xvnc with that display number and exit if the display number is not

available.  For example:

.RS

vncserver :13

.RE

Editing the file $HOME/.vnc/xstartup allows you to change the applications run

at startup (but note that this will not affect an existing VNC session.)

.SH OPTIONS

You can get a list of options by passing \fB\-h\fP as an option to vncserver.

In addition to the options listed below, any unrecognised options will be

passed to Xvnc - see the Xvnc man page, or "Xvnc \-help", for details.

.TP

.B \-name \fIdesktop-name\fP

Each VNC desktop has a name which may be displayed by the viewer. The desktop

name defaults to "\fIhost\fP:\fIdisplay#\fP (\fIusername\fP)", but you can

change it with this option.  The desktop name option is passed to the xstartup

script via the $VNCDESKTOP environment variable, which allows you to run a

different set of applications depending on the name of the desktop.

.

.TP

.B \-geometry \fIwidth\fPx\fIheight\fP

Specify the size of the VNC desktop to be created. Default is 1024x768.

.

.TP

.B \-depth \fIdepth\fP

Specify the pixel depth (in bits) of the VNC desktop to be created. Default is

24.  Other possible values are 8, 15 and 16 - anything else is likely to cause

strange behaviour by applications.

.

.TP

.B \-pixelformat \fIformat\fP

Specify pixel format for Xvnc to use (BGRnnn or RGBnnn).  The default for

depth 8 is BGR233 (meaning the most significant two bits represent blue, the

next three green, and the least significant three represent red), the default

for depth 16 is RGB565, and the default for depth 24 is RGB888.

.

.TP

.B \-cc 3

As an alternative to the default TrueColor visual, this allows you to run an

Xvnc server with a PseudoColor visual (i.e. one which uses a color map or

palette), which can be useful for running some old X applications which only

work on such a display.  Values other than 3 (PseudoColor) and 4 (TrueColor)

for the \-cc option may result in strange behaviour, and PseudoColor desktops

must have an 8-bit depth.

.

.TP

.B \-kill :\fIdisplay#\fP

This kills a VNC desktop previously started with vncserver.  It does this by

killing the Xvnc process, whose process ID is stored in the file

"$HOME/.vnc/\fIhost\fP:\fIdisplay#\fP.pid".  The

.B \-kill

option ignores anything preceding the first colon (":") in the display

argument.  Thus, you can invoke "vncserver \-kill $DISPLAY", for example at the

end of your xstartup file after a particular application exits.

.

.TP

.B \-fp \fIfont-path\fP

If the vncserver script detects that the X Font Server (XFS) is running, it

will attempt to start Xvnc and configure Xvnc to use XFS for font handling.

Otherwise, if XFS is not running, the vncserver script will attempt to start

Xvnc and allow Xvnc to use its own preferred method of font handling (which may

be a hard-coded font path or, on more recent systems, a font catalog.)  In

any case, if Xvnc fails to start, the vncserver script will then attempt to

determine an appropriate X font path for this system and start Xvnc using

that font path.

The

.B \-fp

argument allows you to override the above fallback logic and specify a font

path for Xvnc to use.

.

.TP

.B \-fg

Runs Xvnc as a foreground process.  This has two effects: (1) The VNC server

can be aborted with CTRL-C, and (2) the VNC server will exit as soon as the

user logs out of the window manager in the VNC session.  This may be necessary

when launching TigerVNC from within certain grid computing environments.

.

.TP

.B \-autokill

Automatically kill Xvnc whenever the xstartup script exits.  In most cases,

this has the effect of terminating Xvnc when the user logs out of the window

manager.

.

.TP

.B \-noxstartup

Do not run the %HOME/.vnc/xstartup script after launching Xvnc.  This

option allows you to manually start a window manager in your TigerVNC session.

.

.TP

.B \-xstartup \fIscript\fP

Run a custom startup script, instead of %HOME/.vnc/xstartup, after launching

Xvnc. This is useful to run full-screen applications.

.

.TP

.B \-list

Lists all VNC desktops started by vncserver.

.SH FILES

Several VNC-related files are found in the directory $HOME/.vnc:

.TP

$HOME/.vnc/xstartup

A shell script specifying X applications to be run when a VNC desktop is

started.  If this file does not exist, then vncserver will create a default

xstartup script which attempts to launch your chosen window manager.

.TP

/etc/tigervnc/vncserver-config-defaults

The optional system-wide equivalent of $HOME/.vnc/config. If this file exists

and defines options to be passed to Xvnc, they will be used as defaults for

users. The user's $HOME/.vnc/config overrides settings configured in this file.

The overall configuration file load order is: this file, $HOME/.vnc/config,

and then /etc/tigervnc/vncserver-config-mandatory. None are required to exist.

.TP

/etc/tigervnc/vncserver-config-mandatory

The optional system-wide equivalent of $HOME/.vnc/config. If this file exists

and defines options to be passed to Xvnc, they will override any of the same

options defined in a user's $HOME/.vnc/config. This file offers a mechanism

to establish some basic form of system-wide policy. WARNING! There is

nothing stopping users from constructing their own vncserver-like script

that calls Xvnc directly to bypass any options defined in

/etc/tigervnc/vncserver-config-mandatory.  Likewise, any CLI arguments passed

to vncserver will override ANY config file setting of the same name. The

overall configuration file load order is:

/etc/tigervnc/vncserver-config-defaults, $HOME/.vnc/config, and then this file.

None are required to exist.

.TP

$HOME/.vnc/config

An optional server config file wherein options to be passed to Xvnc are listed

to avoid hard-coding them to the physical invocation. List options in this file

one per line. For those requiring an argument, simply separate the option from

the argument with an equal sign, for example: "geometry=2000x1200" or

"securitytypes=vncauth,tlsvnc". Options without an argument are simply listed

as a single word, for example: "localhost" or "alwaysshared".

.TP

$HOME/.vnc/passwd

The VNC password file.

.TP

$HOME/.vnc/\fIhost\fP:\fIdisplay#\fP.log

The log file for Xvnc and applications started in xstartup.

.TP

$HOME/.vnc/\fIhost\fP:\fIdisplay#\fP.pid

Identifies the Xvnc process ID, used by the

.B \-kill

option.

.SH SEE ALSO

.BR vncviewer (1),

.BR vncpasswd (1),

.BR vncconfig (1),

.BR Xvnc (1)

.br

https://www.tigervnc.org

.SH AUTHOR

Tristan Richardson, RealVNC Ltd., 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.