MESSAGE
| DATE | 2006-05-31 |
| FROM | Ruben Safir
|
| SUBJECT | Re: [NYLXS - HANGOUT] X11 Tutorial
|
xinit /usr/bin/ssh -l ruben -X stat29 /usr/X11R6/bin/wmaker -- :1
On Wed, May 31, 2006 at 10:49:03PM -0400, Ruben Safir wrote:
> ----- Forwarded message from Ruben Safir -----
>
> X-Authentication-Warning: www2.mrbrklyn.com: majordomo set sender to owner-hangout-at-nylxs.com using -f
> Subject: [NYLXS - HANGOUT] Re: [Hardhats-members] Mac,m Linux, CrossOver and stuff (was: Ope
> n source and accessibility)
> From: Ruben Safir
> Reply-To: ruben-at-mrbrklyn.com
> To: hardhats-members-at-lists.sourceforge.net
> Cc: hangout-at-mrbrklyn.com
> In-Reply-To:
> Organization: Brooklyn Linux Solutions
> X-Mailer: Ximian Evolution 1.4.4
> Date: Wed, 22 Mar 2006 21:18:46 -0500
> Precedence: bulk
> X-Keywords:
> X-UID: 8015
>
> On Wed, 2006-03-22 at 14:55, Kevin Toppenberg wrote:
> > Excellent link. Thanks! I was looking for something like this a year
> > ago, and could only find Cygwin, which was too unweildy for me.
> >
> > Help me understand this X stuff. Is this conceptually different from
> > VNC/VNC server?
>
> Yes - its entirely different and VNC on Unix just another X instance
> without all the capabilities of X.
>
> In its simplest basic design, you have an X server. An X server runs on
> yourhostA and listens for a client to run. It then displays the
> programs your asking it to run on a determined display and screen. A
> client is any program have has the ability to display in X. The X
> server understands calls and events. In response to these requests is
> makes graphic displays and responds device events (such as a mouse and a
> cursor) connected to a terminal. The X server understands network
> requests and talks TCP/IP and Unix Sockets and knows cryptography.
>
> X can be started in many ways. But in a simplest way assume that you
> are at a console screen with nothing running but the Bourne Again
> Shell. On your counsel you want to start an X server and run an XTERM
> client on it. The XTERM client is on a mount partition under
> /usr/X11R6/bin/xterm
>
> X comes with a program called xinit to help you do this. You can run
> the following command ($ is the prompt)
>
> $ xint /usr/X11R6/bin/xterm
>
> Now, on a normal X86 architecture gnu/Linux system (if preinstalled
> settings are normal) will give you a regular grey sreen with a single
> XTERM in the upper left hand corner of the screen. There is no window
> manager so you can't move, minimize, change the size or anything else to
> the xterminal. You can, however, now run a window manager on top of the
> xterm terminal. In this environment, a child parent relationship is
> created between the Xterminal and the window manager. If you kill the
> xterm, the entire window manager dies and then X itself will stop. My
> favorite window manager is wmaker so I can run this command in my xterm:
>
> $ /usr/X11R6/bin/wmaker
>
> now the entire working environment pops up. If you can't find a window
> manager try twm
>
> $ /usr/X11R6/bin/twn
>
> Kill the xterm and everything stops ... all good.
>
> Now your X server can run more than a single display. You can run two
> displays. On GNU/Linux run the past command again
>
> $ xint /usr/X11R6/bin/xterm
>
> All good and you have X running on display 0. Type CTL ALT F2.
> You are now looking at another counsel. Log on with your username and
> password.
>
> Now lets start a Second Instance of X in display 1
>
> $ xinit /usr/X11R/bin/xterm -display :1 -- :1
>
> This is the more generalized command as the previous one. In ALSO
> starts X, a new instance of it, and it establishes display 1. The X
> server now assigned to display 1 is now running the program xterm again,
> this time it is being told to display itself on the X server running on
> display 1..
>
> Now - do a CTL ALT F7
>
> That is your X Server Display 0
>
> Do a CTL ALT F8
>
> That is your X Server Display 1
>
> Do and CTL ALT F3. This is a new counsel. Log in again
>
> Now try:
>
> $ xinit /usr/X11R/bin/xterm -display :0 -- :2
>
>
> What does this do?
>
> It starts X up and you are now looking at display 2 on CLT ALT F9 - BUT
> YOU SEE NO XTERM? Where did your XTERM go?
>
> Your X Server passed it off the the X Server running on display 0.
>
> Do a CTL ALT F7
>
> And you should see it there.
>
> Now, X can open client programs from a remote host as well. It has its
> own networking protocols BUT, most sane GNU/Linux systems limit access
> for remote system execution calls, for all the obvious reasons. If you
> have a VPN, you can use blow open a system behind your gateway and use
> the native X protocol. More normally you need to use something like SSH
> (or maybe I don't know how to do it better :) ).
>
>
> Lets say you have two systems. Host www2 and stat29. And lets say that
> you set up RSA private and public key cryptography between the two boxes
> so you don't need a password to authenticate with a password. You can
> do this quickly with a variation of the following comments
>
> $ ssh-keygen -b 1024 -t rsa <==== DO NOT GIVE A PASSWORD FOR THE
> PRIVATE KEY
>
> $scp ~/.ssh/id_rsa.pub you-at-remote_host:~/.ssh/authorized_keys
>
> now you should be able to ssh into the remote host without password
> authenticaiton
>
> ssh -l you remote_host
>
> exit the remote host and now we are ready to run remote programs to a
> new X Server
>
> $ xinit ssh -l ruben -X www2 /usr/X11R6/bin/xterm -- 2
>
> substituting your user name and host names, and you should see the
> xterminal from a remote host running on your local X server controlling
> display 2.
>
> the -X in ssh forwards to X ports through your encrypted tunnel. Let
> ssh take care of the display information for your client program since
> your running through the port.
>
> Kill it and then try it with your favorite window manager
>
> $ xinit ssh -l ruben -X www2 /usr/X11R6/bin/wmaker -- 2
>
> In theory, X can run any program from any were and display it anywhere.
> X makes no assumptions that your computer has only 1 keyboard, one
> screen and one mouse. X is designed to be as usable on big iron as it
> is on a PC.
>
> Ruben
>
>
>
>
> You can tell your X server to run X term on a different display, display
> 0 for example.
>
>
>
>
>
> > Is the app running on the local computer instead of
> > the server?
> >
>
> either or both. Conceptually, X is a networked application server
> > Thanks again
> >
> > Kevin
> >
> >
> > On 3/21/06, Theodore Ruegsegger wrote:
> > > Marc Aylesworth wrote:
> > >
> > > > Also Cygwin has a X server that works on windows so there
> > > > is X on Windows.
> > >
> > > A little-known but excellent X server for Windows is
> > > XDeep/32. It's "freeware" (proprietary, but available as a
> > > binary at no cost). Trivial to install and use:
> > >
> > > X-Deep/32
> > > http://www.pexus.com/
> > >
> > > When I'm forced to use a Windows box (for example, by our
> > > Citrix VPN when I connect to work from home), I run X apps
> > > on my GNU servers and use XDeep/32 to display them on the
> > > (Windows) Citrix server. I tunnel X through ssh thus:
> > >
> > > * Start XDeep; use the localhost (127.0.0.1) network
> > > interface--it's the most conservative. Ssh will handle
> > > getting the X traffic there.
> > >
> > > * For the ssh connection, use PuTTY (be sure to enable X
> > > tunneling). Start any X application. It should "just
> > > work", displaying neatly on the Windows box.
> > >
> > > * To have managed windows in XDeep, go to Options/Window
> > > Modes: Multiple Window Modes and select Multiple MS Window
> > > Mode.
> > >
> > > As with Exceed or any other X server, you won't see anything
> > > on the desktop until you actually open an X client
> > > application.
> > >
> > > Cygwin/X is, of course, Free (as in FLOSS). From the website,
> > > it sounds a bit bigger than just an X server:
> > >
> > > Cygwin/X
> > > http://x.cygwin.com/
> > >
> > > A variant of Cygwin/X that's probably simpler to install is
> > >
> > > XWinLogon
> > > http://www.calcmaster.net/visual-c++/xwinlogon/
> > >
> > > Ted
> > >
> > >
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> > >
> >
> >
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>
> ----- End forwarded message -----
>
> --
> __________________________
> Brooklyn Linux Solutions
>
> So many immigrant groups have swept through our town
> that Brooklyn, like Atlantis, reaches mythological
> proportions in the mind of the world - RI Safir 1998
>
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
> http://fairuse.nylxs.com
>
> "Yeah - I write Free Software...so SUE ME"
>
> http://www.mrbrklyn.com - Consulting
> http://www.inns.net <-- Happy Clients
> http://www.nylxs.com - Leadership Development in Free Software
> http://www2.mrbrklyn.com/resources - Unpublished Archive or stories and articles from around the net
> http://www2.mrbrklyn.com/downtown.html - See the New Downtown Brooklyn....
>
--
__________________________
Brooklyn Linux Solutions
So many immigrant groups have swept through our town
that Brooklyn, like Atlantis, reaches mythological
proportions in the mind of the world - RI Safir 1998
DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
http://fairuse.nylxs.com
"Yeah - I write Free Software...so SUE ME"
http://www.mrbrklyn.com - Consulting
http://www.inns.net <-- Happy Clients
http://www.nylxs.com - Leadership Development in Free Software
http://www2.mrbrklyn.com/resources - Unpublished Archive or stories and articles from around the net
http://www2.mrbrklyn.com/downtown.html - See the New Downtown Brooklyn....
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