linuxvnc(1) General Commands Manual linuxvnc(1)NAME
linuxvnc - export a tty to any VNC client
SYNOPSIS
linuxvnc [tty_number [args]]
DESCRIPTION
It follows the same idea as WinVNC, x11vnc or OSXvnc, i.e. it takes an existing desktop and exports it via RFB (VNC), just that LinuxVNC
exports text.
If you want to export another tty, specify it as 'tty_number'. You can also pass VNC options to tune what encodings are used for the VNC
session. You can read x11vnc man page for more information on this.
OPTIONS -rfbport port
TCP port for RFB protocol.
-rfbwait time
Max time in ms to wait for RFB client.
-rfbauth passwd-file
Use authentication on RFB protocol (use 'storepasswd' to create passwd file).
-rfbversion 3.x
Set the version of the RFB we choose to advertise.
-permitfiletransfer
Permit file transfer support.
-passwd plain-password
Use authentication (use plain-password as password, USE AT YOUR RISK).
-deferupdate time
Time in ms to defer updates (default 40).
-deferptrupdate time
Time in ms to defer pointer updates (default none).
-desktop name
VNC desktop name (default "LibVNCServer").
-alwaysshared
Always treat new clients as shared.
-nevershared
Never treat new clients as shared.
-dontdisconnect
Don't disconnect existing clients when a new non-shared connection comes in (refuse new connection instead).
-httpdir dir-path
Enable http server using dir-path home.
-httpport portnum
Use portnum for http connection.
-enablehttpproxy
Enable http proxy support.
-progressive height
Enable progressive updating for slow links.
-listen ipaddr
Listen for connections only on network interface with addr ipaddr.
SEE ALSO x11vnc(1).
AUTHOR
This manual page was written by Ludovic Drolez <ldrolez@debian.org>, for the Debian project (but may be used by others).
19 November 2011 linuxvnc(1)
Check Out this Related Man Page
Xvnc(1) TightVNC Xvnc(1)NAME
Xvnc - an X server providing VNC connectivity
SYNOPSIS
Xvnc [:display] [-geometry widthxheight] [-depth depth] [-pixelformat rgbNNN|bgrNNN] [-udpinputport port] [-rfbport port] [-rfbwait time]
[-nocursor] [-rfbauth passwd-file] [-httpd dir] [-httpport port] [-deferupdate time] [-economictranslate] [-lazytight] [-desktop
name] [-alwaysshared] [-nevershared] [-dontdisconnect] [-viewonly] [-localhost] [-interface ipaddr] [-inetd] [-compatiblekbd] [X-
options...]
DESCRIPTION
Xvnc is a VNC (Virtual Network Computing) server. It acts like an X server with a virtual display. The display can be seen by a VNC viewer
application, which may be running on a different machine: see vncviewer(1). Xvnc is built inside the source code tree of XFree86, and
shares many options with it.
Normally, you don't need to start Xvnc manually; use the vncserver(1) wrapper script instead. This script sets reasonable defaults for Xvnc
session, checks many error conditions etc.
Please read the BUGS section if you plan to use VNC on an untrusted network.
OPTIONS
Xvnc supports many standard X server options and a number of VNC-specific options. To see what standard X server options are supported,
please look at the Xvnc -help output and read the Xserver(1) manual page for details on those options.
The VNC-specific options are as follows:
-geometry widthxheight
Set desktop width and height.
-depth depth
Set the colour depth of the visual to provide, in bits per pixel. Must be a value between 8 and 32.
-pixelformat rgbNNN|bgrNNN
Set colour format for pixels representation. The viewer can do the conversion to any other pixel format, but it is faster if the
depth and pixel format of the server is the same as the equivalent values on the viewer display.
-udpinputport port
UDP port for keyboard/pointer data.
-rfbport port
TCP port for RFB protocol. The RFB protocol is used for commnunication between VNC server and clients.
-rfbwait time
Maximum time, in milliseconds, to wait for an RFB client (VNC viewer).
-nocursor
Don't put up a pointer cursor on the desktop.
-rfbauth passwd-file
Use authentication on RFB protocol from the specified file. The passwd-file can be created using the vncpasswd(1) utility.
-httpd dir
Serve files via HTTP protocol from the specified directory. Normally, Java viewer classes are stored in such directory.
-httpport port
TCP port on which Xvnc should listen for incoming HTTP connections (to allow access to the desktop from any Java-capable browser).
-deferupdate time
Time in milliseconds, to defer screen updates (default 40). Deferring updates helps to coalesce many small desktop changes into a
few larger updates thus saving network bandwidth.
-economictranslate
Use less memory-hungry pixel format translation.
-lazytight
Disable the "gradient" filter in Tight encoding (TightVNC-specific). The "gradient" filter often helps to improve data compression
ratios, but may slow down the server performance. Please note that this filter is never used when a client enables JPEG compression
in the Tight encoding.
-desktop name
Set VNC desktop name ("x11" by default).
-alwaysshared
Always treat new clients as shared, never disconnect existing client on a new client connection.
-nevershared
Never treat new clients as shared, do not allow several simultaneous client connections.
-dontdisconnect
Don't disconnect existing clients when a new non-shared connection comes in, refuse new connection instead.
-viewonly
Don't accept keboard and pointer events from clients. All clients will be able to see the desktop but won't be able to control it.
-localhost
Only allow loopback connections from localhost. This option is useful in conjunction with SSH tunneling.
-interface ipaddr
Listen for client connections only on the network interface with given ipaddr.
-inetd Xvnc is launched by inetd. This option causes Xvnc to redirect network input/output to stdin/stdout.
-compatiblekbd
Set META and ALT keys to the same X modifier flag, as in the original version of Xvnc by AT&T labs (TightVNC-specific).
BUGS
There are many security problems in current Xvnc implementation. It's recommended to restrict network access to Xvnc servers from untrusted
network addresses. Probably, the best way to secure Xvnc server is to allow only loopback connections from the server machine (the -local-
host option) and to use SSH tunneling for remote access to the Xvnc server. For details on SSH tunneling, see
<URL:http://www.cl.cam.ac.uk/Research/DTG/attarchive/vnc/sshvnc.html> .
SEE ALSO vncserver(1), vncviewer(1), vncpasswd(1), vncconnect(1), sshd(1)AUTHORS
Original VNC was developed in AT&T Laboratories Cambridge. TightVNC additions were implemented by Constantin Kaplinsky. Many other people
participated in development, testing and support.
Man page authors:
Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>,
Tim Waugh <twaugh@redhat.com>,
Constantin Kaplinsky <const@tightvnc.com>
August 2006 Xvnc(1)