Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop
Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard
Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard
Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard
In Leopard, the following keys can be held down while selecting an area (via Command-Shift-4 or Command-Control-Shift-4):

The example below uses 8 weeks – from the command line enter:

dsquery computer -inactive 8 -limit 0

After reviewing this list to make sure these computers no longer exist on your network you can use the following command to find and delete them:

dsquery computer -inactive 8 -limit 0 | dsrm -noprompt

Updated: January 21, 2005

Managing inheritance of Group Policy
To apply the settings of a Group Policy object (GPO) to the users and computers of a domain, site, or organizational unit, you can link that domain site or organizational unit to that GPO. You can add one or more GPO links to each domain, site, and organizational unit in Group Policy Management Console. The settings deployed by GPOs linked to higher containers (parent container) in Active Directory are inherited by default to child containers and combine with any settings deployed in GPOs linked to child containers. If multiple GPOs attempt to set a setting to conflicting values, the GPO with the highest precedence sets the setting. GPO processing is based on a last writer wins model, and GPOs that are processed later have precedence over GPOs that are processed sooner. Group Policy objects are processed according to the following order:

To get rid of that unwanted driver, device, or service:
1) Open the “Start” menu and choose “Run…”
2) Type in “cmd” (without the quotes) and click “ok”.
3) At the cmd prompt, type in “set devmgr_show_nonpresent_devices=1″ (without the quotes) and press enter. (Note that nothing seems to happen–this is ok. We are actually setting an environment variable which is going to help us to see hidden devices)
4) On the next cmd prompt line, type in “devmgmt.msc” (without the quotes) and press enter. This will launch the Windows Device Manager Console.
5) In the Device Manager Console, from the “View” menu, select “Show Hidden Devices”.