NAME¶

SYNOPSIS¶

DESCRIPTION¶

Moreover, a username and a hostname can be given to start the tigervncserver via SSH on the given machine under the provided user account, e.g.:

Note that this requires the same version of the tigervncserver wrapper script on the remote machine as is on the local machine. System defaults for this wrapper script are found in /etc/vnc.conf. This defaults can be overwritten by the user defaults given in $HOME/.vnc/vnc.conf. Finally, commandline options have the highest priority overwriting the settings in both /etc/vnc.conf and $HOME/.vnc/vnc.conf. Editing the file $HOME/.vnc/Xvnc-session allows you to change the applications run at startup (but note that this will not affect an existing desktop).

OPTIONS¶

-dry-run

Do not actually do anything, but only perform the checks if the requested action would be possible. For example, there will be checks performed for the availability of the requested display number display#.

-verbose

This will turn on some debug output.

-useold

Only start a new TigerVNC server if a Xtigervnc server for your account is not already running on the requested display number display#. If no display number is requested, a new TigerVNC server will only be started if there is no TigerVNC server running under your user account. In any case, information about the newly started TigerVNC server or the reused TigerVNC server session will be printed.

-cleanstale

Sometimes the Xtigervnc server crashes and does not clean up correctly. In this case, there will be a stale pidfile in $HOME/.vnc as well as stale X11 locks and sockets in /tmp. When the -cleanstale option is given, then tigervncserver first tries to cleanup all these stale files before trying to determine which X display number is available for use.

-localhost [yes|no]

Should the TigerVNC server only listen on localhost for incoming TigerVNC connections. Useful if you use SSH and want to stop non-SSH connections from any other hosts. If the option is not specified, then the behavior is as follows: We will only listen on localhost if the sec-types list does not contain any TLS* or X509* security types or if the list contains at least one *None security type. Otherwise, we will listen on all network addresses of the machine.

-name desktop-name

Each desktop has a name which may be displayed by the viewer. It defaults to "host:display# (username)" but you can change it with this option. It is passed in to the Xvnc-session script via the $VNCDESKTOP environment variable, allowing you to run a different set of applications according to the name of the desktop.

-geometry widthxheight

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

-depth depth

Specify the pixel depth in bits of the desktop to be created. Default is 24, other possible values are 8, 15 and 16 - anything else is likely to cause strange behavior by applications.

-pixelformat format

Specify pixel format for server 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 for depth 24 is RGB888.

-cc 3

As an alternative to the default TrueColor visual, this allows you to run an Xtigervnc 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 behavior, and PseudoColor desktops must be 8 bits deep.

-xdisplaydefaults

The -xdisplaydefaults option can be used to derive values for the above three options, i.e., -geometry to -pixelformat, from the running X session. The derived dimensions are adjusted by the -wmDecoration option.

-wmDecoration widthxheight

sets the adjustment of the dimensions derived by -xdisplaydefaults to accommodate the window decoration used by the X11 window manager. This is used to fully display the VNC desktop even if the VNC viewer is not in full screen mode.

-fp font-path

If the tigervncserver script detects that a font path is configured in /etc/X11/xorg.conf, it will attempt to use this font path for Xtigervnc. Otherwise, if no fond path is configured, the tigervncserver script will attempt to start Xtigervnc and allow Xtigervnc 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.) The -fp argument allows you to override the above logic and specify a font path for Xtigervnc to use.

-fg

Runs the Xnv-session as a foreground process. This has two effects: (1) The Xnv-session can be aborted with CTRL-C, and (2) the TigerVNC server will be killed as soon as the user logs out of the window manager in the Xvnc-session. This may be necessary when launching TigerVNC from within certain grid computing environments.

-autokill

Automatically kills the TigerVNC server whenever the Xvnc-session script exits. In most cases, this has the effect of terminating Xtigervnc when the user logs out of the window manager.

-noxstartup

Do not run the $HOME/.vnc/Xvnc-session script after launching Xtigervnc. This option allows you to manually start a window manager in your TigerVNC session.

-xstartup script

Run a custom startup script, instead of $HOME/.vnc/Xvnc-session, after launching Xtigervnc. This is useful to run full-screen applications.

-rfbport port#

Specifies the TCP port on which Xtigervnc listens for connections from viewers (the protocol used in VNC is called RFB - "remote framebuffer"). The default is 5900 plus the display number display#.

-httpPort port#

Specifies the port on which the mini-HTTP server runs. On default, the server is not started.

-baseHttpPort port#

Specifies the base for the port number on which the mini-HTTP server runs. The real -httpPort option will be derived from this base plus the display number.

-SecurityTypes sec-types

Specify which security scheme to use for incoming connections. Valid values are a comma separated list of None, VncAuth, Plain, TLSNone, TLSVnc, TLSPlain, X509None, X509Vnc and X509Plain. Default is VncAuth if -localhost is not given and VncAuth, TLSVnc if -localhost no is given.

-PlainUsers user-list

A comma separated list of user names that are allowed to authenticate via any of the *Plain security types (Plain, TLSPlain, etc.). Specify * to allow any user to authenticate using this security type. Default is to only allow the user that has started the tigervncserver wrapper script.

-PAMService service-name

PAM service name to use when authenticating users using any of the *Plain security types. Default is vnc if /etc/pam.d/vnc is present and tigervnc otherwise. The tigervnc-common package ships the /etc/pam.d/tigervnc PAM service configuration for use by tigervncserver.

-PasswordFile passwd-file | -passwd passwd-file | -rfbauth passwd-file

Specifies the file containing the password used to authenticate viewers for the security types VncAuth, TLSVnc, and X509Vnc. The passwd-file is accessed each time a connection comes in, so it can be changed on the fly via tigervncpasswd(1). The default password file is $HOME/.vnc/passwd.

-X509Cert cert-path and -X509Key key-path

Path to a X509 certificate in PEM format to be used for all X509 based security types (X509None, X509Vnc, etc.) as well as its private key also in PEM format. If the certificate and its key are not provided via the -X509Cert and -X509Key commandline options or their corresponding configuration parameters in /etc/vnc.conf or $HOME/.vnc/vnc.conf, then the tigervncserver wrapper script auto generates a self signed certificate. The auto generated self signed certificates are stored in the files $HOME/.vnc/host-SrvCert.pem and $HOME/.vnc/host-SrvKey.pem.

-kill [[user@]host][:display#|:*]

This kills a TigerVNC desktop previously started with tigervncserver. It does this by killing the Xtigervnc process, whose process ID is stored in the file $HOME/.vnc/host:display#.pid. This can be useful so you can write "tigervncserver -kill $DISPLAY", e.g., at the end of your Xvnc-session file after a particular application exits. If :* is given, then tigervncserver tries to kill all Xtigervnc processes with pidfiles in $HOME/.vnc on the local machine. If no display number is given, then tigervncserver tries to kill the Xtigervnc processes of the user on the local machine if only one such process is running and has a pidfile in $HOME/.vnc. If a host is specified, then tigervncserver will use SSH to kill a Xtigervnc process on the remote machine.

-clean

If given with -kill, then the logfile $HOME/.vnc/host:display#.log is also removed.

-list [[user@]host][:display#|:*]

This lists all running TigerVNC desktop previously started with tigervncserver. If a host is specified, then tigervncserver will use SSH to list Xtigervnc desktops on the remote machine. Stale entries are marked with (stale) in the output.

FILES¶

$HOME/.vnc/vnc.conf

The user configuration file for tigervncserver.

$HOME/.vnc/Xvnc-session

A shell script specifying X applications to be run when a TigerVNC desktop is started. If it doesn't exist and no system default is provided in /etc/vnc.conf, tigervncserver will create a new one which runs a couple of basic applications. To be compatible with older versions of this wrapper script, we will also use the file $HOME/.vnc/xstartup if it is present.

$HOME/.vnc/passwd

The TigerVNC password file for the security types VncAuth, TLSVnc, and X509Vnc.

$HOME/.vnc/host:display#.log

The log file for Xtigervnc and applications started in Xvnc-session.

$HOME/.vnc/host:display#.pid

Identifies the Xtigervnc process ID, used by the -kill option.

$HOME/.vnc/host-SrvCert.pem and $HOME/.vnc/host-SrvKey.pem

The security types X509None, X509Vnc, and X509Plain need a certificate and the corresponding private key. If these are not provided via the -X509Cert and -X509Key commandline options or their corresponding configuration parameters in /etc/vnc.conf or $HOME/.vnc/vnc.conf, then the tigervncserver wrapper script auto generates a self signed certificate for the -X509Cert and -X509Key options of the Xtigervnc server. The auto generated self signed certificates are stored in the above given two files. If the user wants their own certificate – instead of the on demand auto generated one – they can either specify it via the -X509Cert and -X509Key options to the tigervncserver wrapper script or replace the auto generated files $HOME/.vnc/host-SrvCert.pem and $HOME/.vnc/host-SrvKey.pem. These files will not be overwritten once generated by the tigervncserver wrapper script.

Furthermore, there is a global configuration file for tigervncserver:

/etc/vnc.conf

The global configuration file for tigervncserver.

SEE ALSO¶

AUTHOR¶