[EMAIL PROTECTED] wrote:

> Hi All,
> 
> Suppose I am running a debian linux machine with KDE as the GUI, and
> tightVNC. A friend is using the linux machine locally and I would like to
> show them how to do something. I am on an arbitrary pc somewhere on the
> network which may or may not have VNC veiwer installed, and may be any OS.
> So I want to use the java viewer in a browser to access the :0 desktop so
> that my friend can see what I am doing on their local screen and so learn
> how to do whatever it is next time. I can use vnc viewer to do this, but
> I've had no luck using the java viewer. I am trying <name>:5800 in the
> browser. Anyone had any success with this? Should I use real VNC instead of
> tightVNC?

Some things to do or to think about.

It is about showing something. THen the best thing is to have a vnc-session in 
the middle. That is default on linux/unix so no problem. See my attached message 
for how to setup one static vnc-server that compares the best to the console 
session.

Now you can both have a vncviewer pointing to the same session. This must work 
to have the java viewer working.

If you want a java-viewer pointing there, just add the options to the Xvnc command:

-httpd /path/to/vnc/classes
-httpport 5804

REplace /path/to/vnc/classes with the absolute path to your .../vnc/classes/. 
directory (the one containing *.vnc and some java files) and the 5804 with your 
desired portnumber.

btw: there are other options to see the linux console session in a vnc-viewer. 
See their setup for their variants to the -http... options.


CBee



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X-Original-Date: Fri, 23 Jan 2004 10:52:57 +0100
Date: Fri, 23 Jan 2004 10:52:57 +0100

This is a description on how to use Xvnc as the Xserver. It is jet an other way 
to create an always running vnc session on unix/linux. It is based on RedHat 9 
but I think it can easy be moved to every unix that has a Xvnc binary.

My goal was to create a linux server that has a text console (for RedHat: as if 
running in runlevel 3) but still has gdm available (actually running runlevel 
5). Roughly, I just replaced the Xserver (XFree86 on linux) with Xvnc.

I first installed the vncserver packages from the distribution and start 
`vncserver` at least once to have a vnc password file.

Then (sidestep) I installed 
http://www.sourcecodecorner.com/articles/vnc/linux.asp. I don't expect it is 
needed but for me it is the reason to run in runlevel 5 and not in runlevel 3.

The real work is in getting Xvnc used as an Xterminal that runs on the same 
host. For GNOME (gdm) users: edit '/etc/X11/gdm/gdm.conf':
- disable VTAllocation (about line 104)
        #VTAllocation=true
        VTAllocation=false
- add server definitions (at the end, the double inserted lines are continuation 
of the previous line, combine them.)
        [server-ROOTVNC]
        # vncsession, using vncpassword from root
        name=ROOTVNC server
        flexible=false
        command=/usr/bin/Xvnc -geometry 800x600 -depth 8 -rfbwait 120000
                -rfbauth /root/.vnc/passwd
        [server-FREEVNC]
        # vncsession, using no vncpassword
        name=FREEVNC server
        flexible=false
        command=/usr/bin/Xvnc -geometry 800x600 -depth 8 -rfbwait 120000
                -alwaysshared -dontdisconnect
- in the [servers] section, add and/or replace lines that indicate an Xserver:
        # disable the X session on the console
        #0=Standard
        # use roots vncsession on :0
        0=ROOTVNC
        # use the free-access vncsession on :4
        4=FREEVNC
Now restart gnome (or the entire machine) and see the console stays in its text 
mode and there are 2 vnc sessions running: ONe at `vncviewer machine:0` that 
uses the vncpassword of root and an other one at `vncviewer machine:4` that has 
no vncpassword. All provide a login session.

To get the same setup with a KDE or XDM session, it is even simpler. Edit 
'/etc/X11/xdm/Xservers': add the next lines (and comment out all others). 
WRAPWARNING: each line is either comment or it starts with the same word as it 
ends (:0 to :0 and :4 to :4).
        # disable the X session on the console
        #:0 local /usr/X11R6/bin/X
        # vncsession :0, using vncpassword from root.
        :0 ROOTVNC local /usr/bin/Xvnc -geometry 800x600 -depth 8 -rfbwait
                120000 -rfbauth /root/.vnc/passwd :0
        # vncsession :4, no vncpassword.
        :4 FREEVNC local /usr/bin/Xvnc -geometry 800x600 -depth 8 -rfbwait
                120000 -alwaysshared -dontdisconnect :4

Now restart the display manager (or the machine) and...


Detail, if you want to keep the X11 server on the console (not have the :0 vnc 
session): you might need to add '-vt7' to the 'command=/usr/X11R6/bin/X -vt7' line.


If I can find some time, I might put this description on a website some time. If 
others want to do so, please do. If I come acros any other system (HP-UX might 
be the first) I might mail an update. Be free to test it on any other system. 
Most likely you only need to update the Xservers file according the above 
/etc/X11/xdm/Xservers description.


CBee




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