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Full Discussion: Questions on CLI and xwindow
Top Forums UNIX for Dummies Questions & Answers Questions on CLI and xwindow Post 302953769 by bakunin on Tuesday 1st of September 2015 08:05:56 AM
Old 09-01-2015
Quote:
Originally Posted by jamie_123
So I am running a linux box using the classical terminal (CTRL+ALT+F1-F6), the machine has an x-window system installed as well, which I do not want to use to launch programs.
hmm - didn't you want to have several CLIs at once? Now i am confused about what you in fact want.

Quote:
Originally Posted by jamie_123
The scenario that I was thinking of was to launch a graphical program from one of these classical terminals. I was wondering, since I have x-window installed, it must be possible to create a window on top of the classical terminal somehow. I hope my question makes more sense now?
The question makes sense, but it isn't possible to do so. Graphical programs are graphical, because they use certain (graphical) functions: on a terminal to display character "a" you simply send an "a". On a graphical application, to display an "a" you need to decide in which font you want it displayed, get the (graphical) definition of the character "a" in the font and the respective size, finally use some graphics routines ("draw line", "draw curve", "fill area", etc.) to finally display a picture resembling an "a". All these functions are carried out (via several layers of software) by the underlying libraries (the X-Server and the Window-Manager) so that for the application itself it boils down to simply order "display an 'a'" again. But without these layers of software underneath the order would not make sense.

If your goal is to start a graphical application using a X-Server running somewhere else (on local hardware or some remote system on the network): this is possible, in fact it is the normal use one makes from graphical environments.

When you start a program (an "X-Client", because it uses services) it needs to be told which X-Server (a program which provides these services) to use. This is is done via an environment variable called "DISPLAY". For instance:

Code:
# export DISPLAY=myrunningxserver.network.org:0.0
# /usr/bin/firefox &

This will (if everything is configured correctly) make firefox run on the system you issued the command but display its window at the system "myrunningxserver.network.org" at display 0 (there could be several displays), screen 0 (every display could consist of several screens).

If you want to know more about how X-Windows works i suggest to read this thread

I hope this helps.

bakunin
 

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LEARN ABOUT CENTOS

firefox

FIREFOX(1)							Linux User's Manual							FIREFOX(1)

NAME

       firefox - a Web browser for X11 derived from the Mozilla browser

SYNOPSIS

       firefox [OPTIONS] [URL]

       firefox-bin [OPTIONS] [URL]

DESCRIPTION

       Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability.

USAGE

       firefox is a simple shell script that will set up the environment for the actual executable, firefox-bin.

OPTIONS

       A summary of the options supported by firefox is included below.

   GTK options
       --gdk-debug=FLAGS Gdk debugging flags to set

       --gdk-no-debug=FLAGS
	      Gdk debugging flags to unset

       --gtk-debug=FLAGS
	      Gtk+ debugging flags to set

       --gtk-no-debug=FLAGS
	      Gtk+ debugging flags to unset

       --gtk-module=MODULE
	      Load an additional Gtk module

   X11 options
       --display=DISPLAY
	      X display to use

       --sync Make X calls synchronous

       --no-xshm
	      Don't use X shared memory extension

       --xim-preedit=STYLE

       --xim-status=STYLE

       --g-fatal-warnings
	      Make all warnings fatal

   Firefox options
       -h, -help
	      Show summary of options.

       -v, -version
	      Print /usr/bin/firefox-bin version.

       -CreateProfile profile
	      Create profile.

       -P profile
	      Start with profile.

       -ProfileManager
	      Start with profile manager.

       -remote command
	      Execute command in an already running Firefox process.  For more info, see: http://www.mozilla.org/unix/remote.html

       -jsconsole
	      Start with Javascript Console

       -chrome url
	      Load the specified chrome.

       -no-remote
	      Don't connect to any other running instances of firefox. Use this if you want to run firefox in an entirely new process. By default,
	      firefox will delegate a command to an already running instance.

       -safe-mode
	      Start firefox in safe-mode. This disables all third-party extensions, and may be necessary if you are having problems with an exten-
	      sion you installed.

       -new-tab url
	      Open url in a new tab.

       -new-window url
	      Open url in a new window.

       -preferences
	      Open the preferences dialog.

       -private
	      Start firefox in private browsing mode.

       -private-toggle
	      Toggle private browsing mode.

       -setDefaultBrowser
	      Set firefox as the default web browser.

       -search term
	      Search for term with your default search engine.

       -migration
	      Start with migration wizard.

       -new-instance
	      Open new instance, not a new window in running instance.

FILES

       /usr/bin/firefox - shell script wrapping firefox
       /usr/lib/mozilla/firefox-bin - firefox executable

VERSION

       1.0

BUGS

       To report a bug, please visit http://bugzilla.mozilla.org/

SEE ALSO

       mozilla(1)

AUTHORS

       The Mozilla Organization
	      http://www.mozilla.org/about.html

firefox 							  August 07, 2001							FIREFOX(1)
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