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Mac OS X: Move the Dock and Menu Bar To External Display

I'm using an external display with a MacBook Pro. I do not want to use the external monitor as a mirrored display. I need to move the dock and the menu bar to external monitor. How do I setup the external monitor as main display?
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Gnome Volume Control: Disabled Sound Themes

Problem is that every time I click something I get annoying sound from computer speaker. So I tried to disable or set new sound theme by visiting System > Preferences > Sound. The Sound Theme tab is greyed out. Sound itself is not working and I can only get annoying sound. How do I fix this problem under Debian or Ubuntu Linux gnome desktop system?
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Apple OS X Lock Desktop / Screen

I need to prevent others using my desktop or laptop while I'm away from it. How do I lock my Laptop (Macbook or Macbook pro) / desktop using Mac OS X operating systems without using 3rd party applications?
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Mac OS X: Set Port Forwarding Nat Router (Internet Sharing)

I'd like to set my Macbook as a router for my other desktop computer. How do I set NAT and port forwarding under MAC OS X? How do I forward ports using OS X for BitTorrent clients?
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Linux Gnome Numeric Keypad Disabled [ Mouse keys ]

Q. I'm using Gnome under Ubuntu Linux and my numeric keypad is disabled. Pressing numlock key does not work any more. I'm not able to use numbers or special symbols from numeric keypad. Reboot does not help or using different keyboard does not help. However, numlock only works if I switch to text console by pressing CTRL+ALT+F1. Now, I'm dam sure this is related to X.org or Gnome. How do I fix this problem?
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Ubuntu Linux: Firefox and Desktop Application Fix Smooth Font Problem ( Render Font Correctly )

Q. How do I render font smoothly in Ubuntu Linux / Gnome desktop systems? How do I get look a likes of the Microsoft / Mac OS X smooth fonts for Firefox and other applications?
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Create / modify keyboard shortcuts in Gnome under Linux / UNIX

Q. I’m using Ubuntu Linux and I’d like to create or modify keyboard shortcuts in Gnome desktop system? How do I do it?

A. You need to use GConf-Editor or gnome keyboard shortcut tool. GConf-Editor is a tool used for editing the GConf configuration database. It might be useful when the proper configuration utility for some software provides no way of changing some option. The main window consists of a tree showing the GConf configuration database hierarchy, a list of the keys available, and documentation for the selected key. Key values can be changed by either changing them directly in the list, or right clicking on them and selecting Edit key. Changes take immediate effect in running programs. New keys can be added by right clicking in the list and selecting New key.

Easy to use - Keyboard Shortcuts tool

Use the Keyboard Shortcuts preference tool to customize the default keyboard shortcuts to your requirements.

Click on System > Preferences > Keyboard Shortcuts to launch the application and view the preconfigured shortcuts.
Create / modify keyboard shortcuts in Gnome under Linux / UNIX  with Keyboard Shortcuts tool

To edit a keyboard shortcut, perform the following steps:

  1. Click the action in the list. If you are using the the keyboard, use the arrow keys to select the shortcut and press Return.
  2. Press the new key or key combination you want to assign to the action.
  3. To clear a shortcut, press Backspace. The action is now marked as Disabled.
  4. To cancel assigning a shortcut, click elsewhere in the window or press Escape.

Advance keyboard shortcuts tool - gconf-editor (GConf-Editor)

You need to install this tool using any one of the following command (Debian / Ubuntu Linux):
$ sudo apt-get install gconf-editor
Or if you are using Fedora / CentOS /RHEL Linux:
# yum install gconf-editor

Run gconf-editor

Use menus or type a command as follows:
$ gconf-editor &

  • Next double click the "apps" folder
  • Next double click the "metacity" folder
  • Finally click the global_keybindings folder


Please note that all these keyboard shortcuts and other settings are saved on a user basis (inside a home directory), so each user can create their own custom setup.