05-05-2011
Do we need many Operating Systems?
we have
windows
linux- redhat ubuntu -or more i don't know
unix- solares
snow-lepord
and recently chrome
what do you think
well when i sow that all has extentions like exe -dsb i felt scared
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Chapters on Linux and Unix:
http://www.prenhall.com/divisions/esm/app/author_tanenbaum/custom/mos2e/
Slides, figures, code, lots of goodies on-line!
CHAPTER 10 CASE STUDY 1: UNIX AND LINUX 671
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10.1.1. UNICS 672
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Hi :)
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LEARN ABOUT CENTOS
xdg-settings
XDG-SETTINGS(1) xdg-settings Manual XDG-SETTINGS(1)
NAME
xdg-settings - get various settings from the desktop environment
SYNOPSIS
xdg-settings {get | check | set} {property} [subproperty] [value]
xdg-settings {--help | --list | --manual | --version}
DESCRIPTION
xdg-settings gets various settings from the desktop environment. For instance, desktop environments often provide proxy configuration and
default web browser settings. Using xdg-settings these parameters can be extracted for use by applications that do not use the desktop
environment's libraries (which would use the settings natively).
xdg-settings is for use inside a desktop session only. It is not recommended to use xdg-settings as root.
OPTIONS
--help
Show command synopsis.
--list
List all properties xdg-settings knows about.
--manual
Show this manual page.
--version
Show the xdg-utils version information.
PROPERTIES
When using xdg-settings to get, check or set a destkop setting, properties and possibly sub-properties are used to specify the setting to
be changed.
Some properties (such as default-web-browser) fully describe the setting to be changed. Other properties (such as
default-url-scheme-handler) require more information (in this case the actual scheme to set the default handler for) which must be provided
in a sub-property.
EXIT CODES
An exit code of 0 indicates success while a non-zero exit code indicates failure. The following failure codes can be returned:
1
Error in command line syntax.
2
One of the files passed on the command line did not exist.
3
A required tool could not be found.
4
The action failed.
EXAMPLES
Get the desktop file name of the current default web browser
xdg-settings get default-web-browser
Check whether the default web browser is firefox.desktop, which can be false even if "get default-web-browser" says that is the current
value (if only some of the underlying settings actually reflect that value)
xdg-settings check default-web-browser firefox.desktop
Set the default web browser to google-chrome.desktop
xdg-settings set default-web-browser google-chrome.desktop
Set the default mailto URL scheme handler to be evolution.desktop
xdg-settings set default-url-scheme-handler mailto evolution.desktop
AUTHOR
Mike Mammarella
Author.
COPYRIGHT
Copyright (C) 2009-2011
[FIXME: source] 06/10/2014 XDG-SETTINGS(1)