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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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Net::CLI::Interact::Transport::Serial(3pm)		User Contributed Perl Documentation		Net::CLI::Interact::Transport::Serial(3pm)

NAME
Net::CLI::Interact::Transport::Serial - Serial-line based CLI connection VERSION
version 1.121640 DECRIPTION
This module provides a wrapped instance of a Serial-line client for use by Net::CLI::Interact. INTERFACE
app On Windows platforms you must download the "plink.exe" program, and pass its location to the library in this parameter. On other platforms, this defaults to "cu", which again you must download and install. runtime_options Based on the "connect_options" hash provided to Net::CLI::Interact on construction, selects and formats parameters to provide to "app" on the command line. Supported attributes: FIXME: on Windows platforms, only the device attribute is supported. device (required) Name of the device providing access to the Serial-line (e.g. "/dev/ttyUSB0" or "COM5". parity You have a choice of "even", "odd" or "none" for the parity used in serial communication. The default is "none". nostop You can control whether to use "XON/XOFF" handling for the serial communication. The default is to disable this, so to enable it pass any True value. speed You can set the speed (or baud rate) of the serial line by passing a value to this named parameter. The default is 9600. reap Only used on Unix platforms, this installs a signal handler which attempts to reap the "ssh" child process. Pass a true value to enable this feature only if you notice zombie processes are being left behind after use. COMPOSITION
See the following for further interface details: o Net::CLI::Interact::Transport AUTHOR
Oliver Gorwits <oliver@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Oliver Gorwits. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-06-12 Net::CLI::Interact::Transport::Serial(3pm)
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