[CentOS] Multiple program instances or multiple log ins?

[Andreas Rogge]

$ rpm -qf /usr/X11R6/bin/Xnest
xorg-x11-Xnest-6.8.2-1.EL.13.20

so "yum install xorg-x11-Xnest" should install Xnest.

The loginscreen ist a bit harder to get:
in /etc/X11/gdm/gdm.conf (if you use gdm) you have to change:
[xdmcp]
Enable=false

to

[xdmcp]
Enable=true

and restart gdm or simply reboot
Warning: restarting gdm will kill your current session
Warning: with xdmcp enabled you will probably want to enable a firewall
or everybody in the world will be able to get a loginscreen from your
machine

Now you can start Xnest with something like
$ Xnest :1 -query localhost
where :1 ist the display number to use (:1 for the first, :2 for the
second, etc.)
and -query localhost tells Xnest to ask localhost for a login screen

Hope this helps.

Regards,
Andreas


Am Mittwoch, den 28.12.2005, 08:11 -0500 schrieb Robert Moskowitz:
> At 03:18 AM 12/28/2005, Andreas Rogge wrote:
> >Hello,
> >
> >i don't know if this does the trick for you, but you can log on multiple
> >times with different users by using Xnest.
> 
> And where is Xnest?
> 
> I found 'something' 
> at: 
> http://linux.s390.org/download/rpm2html/s390/XFree86-Xnest-3.3.5-3.s390.html
> 
> last build 4/00  ??
> 
> I also found this:  http://www.linuxjournal.com/article/7298
> 
> but I can't get it to work.  Well I can <cntl-alt> Fn
> 
> But I can't get a graphic manager started in any of them.
> 
> Even tried gnome-session in F1 window.
> 
> I also read:  http://xwinman.org/basics.php
> 
> But I am not sure of what he is saying here.
> 
> >Let me explain what this means and how it works:
> >As X11 is network-capable you can simply turn your workstation into some
> >kind of Terminal Server.
> >There is Xnest, which is an XServer using your running instance of X as
> >a display instead of a real graphics adapter.
> >You can use Xnest to get another (windowed) X11-Session on your machine
> >and log in with any user you like. These new sessions will be absolutely
> >isolated.
> >The number of sessions is only limited by your system-resources (i.e.
> >oversized Memory won't hurt)
> >
> >Regards,
> >Andreas
> >
> >Am Dienstag, den 27.12.2005, 14:14 -0500 schrieb Robert Moskowitz:
> > > This all comes out of figuring out how I might run Evolution like 
> > I run Eudora.
> > >
> > > I see where Evolution places its data in a hidden directory: ~/.evolution
> > >
> > > Now why it is felt necessary to put all of this stuff in hidden
> > > directories is beyond me.
> > >
> > > So it would seem that Evolution is treating each useid as a
> > > personality for the logged in user.
> > >
> > > Given the way Evolution organizes its data, I could create some more
> > > Linux users, and either:
> > >
> > > Give my main user file permissions to them and somehow run copies of
> > > Evolution using those /home/user directories.  Anyone know how to do that?
> > >
> > > Or do I somehow have to have multiple simultaneous logins? And switch
> > > between them?  I know there is a way to have 4 desktops....
> > >
> > >
> > >
> > >
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> > >
> > >
> >
> >
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