Command line: Difference between revisions

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'''The command line''' is often mentioned as a tool for starting or setting up [[Flightgear]], [[Atlas]], [[Terrasync]], [[FGCOM]] and other programs related to Flightgear. Many users simply don't know, what the command line acutally is or how to make use of it. This article shall help...
'''The command line''' is often mentioned as a tool for starting or setting up [[Flightgear]], [[Atlas]], [[Terrasync]], [[FGCOM]] and other programs related to Flightgear. Many users aren't aware of the command line or how to make use of it. This article may help...


As an advice independent from what operating system you may use:
Operating System independent advice:
'''Try to use copy & paste as much as you can in order to avoid spelling mistakes, whenever you try to execute command line commands!'''
'''Try to use copy & paste as much as possible in order to avoid spelling mistakes, whenever you try to execute command line commands!'''
The command line will do ''exactly'' what you tell her and when you spell it wrong, she'll act the wrong way...
The system will do ''exactly'' what you tell it on the command line and when you get it wrong, the system will do it wrong.


==Windows==
==Windows==
On Windows, you have access to the command line by clicking the "Start" button and then chosing "Run...". Type "cmd" (without quotation marks) into the field and hit Enter.
On Windows, you can get to the command line by clicking the "Start" button and then choosing "Run...". As a handy shortcut to the "Run..." prompt: Hold down the "Windows" key (the one with the windows flag on it) and tap the "R" key.
 
Type "cmd" (without quotation marks) into the field and hit Enter.


''Note: Both Windows XP and Windows Vista might have no "Run..." command in the start menu, when you attempt to try all of this. You can enable the "Run..." command in the "Configure Start Menu" dialog.''


You should see the so called ''prompt'' now, which says something like that:
You should see the so called ''prompt'' now, which says something like that:
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That says you're operating on drive C in directory Windows. The blinking cursor awaits your commands.
That says you're operating on drive C in directory Windows. The blinking cursor awaits your commands.


You can simply change drives by entering <drive-letter>: like that:
You can simply change drives by entering <drive-letter>: as shown below:


  C:\Windows> d:
  C:\Windows> d:
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  C:\Windows>_
  C:\Windows>_


Now how about changing the directory? Assuming you downloaded Flightgear into the directory "Flightgear", that is located on drive D and its directory "Games". You do the following:
Now how about changing the directory? Assuming you downloaded Flightgear into the directory "Flightgear", that is located on drive D and its directory "Simulators". You do the following:


  C:\Windows> d:
  C:\Windows> d:
  D:\> cd Games
  D:\> cd Simulators
  D:\Games> cd Flightgear
  D:\Simulators> cd Flightgear
  D:\Games\Flightgear>_
  D:\Simulators\Flightgear>_


Easy, isn't it? You can also change directly into subdirectories:
Easy, isn't it? You can also change directly into subdirectories:
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On Linux systems, there are several ways to get a command line. As Flightgear does only run in a graphic X-Window system, we'll use a so-called ''terminal''.
On Linux systems, there are several ways to get a command line. As Flightgear does only run in a graphic X-Window system, we'll use a so-called ''terminal''.


The mosty used window managers are Gnome, KDE and Xfce. First way to get yourself a console would be using the window managers menue:
The most often used window managers are Gnome, KDE and Xfce. One way of getting to a console would be using the window managers menu:
*'''KDE''' KDE-Menue > System > Konsole
*'''KDE''' KDE-Menue > System > Konsole
*'''Gnome''' Applications > Accessories > Terminal
*'''Gnome''' Applications > Accessories > Terminal
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  username@computername:~$_
  username@computername:~$_


This (especially the dollar sign) is the so called "prompt", where ''username'' should be the name of the currently logged on user and ''computername'' is the name of your computer.
This (especially the dollar sign) is the so called "prompt", where ''username'' should be the name of the currently logged on user and ''computername'' is the name of your computer. If your prompt is "#" instead of "$", you are logged in as root (superuser) and probably shouldn't be.


Note the "~" (tilde) sign before the prompt. On Linux systems that sign indicates, that you're in your home directory, which normally should be equal to "/home/username".
Note the "~" (tilde) sign before the prompt. On Linux systems that sign indicates, that you're in your home directory, which normally should be equal to "/home/username".
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