Apple Mac OS X Server System Imaging and Software Update Administration For Version 10.4 or Later Bedienungsanleitung PDF herunterladen (Seite 41)

Chapter 2 Creating Boot and Install Images 41

Installing Mac OS Updates

To use Network Install to install operating system updates on client computers, add the

system update package to an install image in the same way you would add any other

package. See “Adding Packages to a Boot or Install Image” on page 39.

You can download Mac OS updates from www.apple.com/support.

Adding Post-Install Scripts to Install Images

Post-install scripts let you make changes to software after it has been installed on client

computers. As the name implies, post-install scripts run at the end of the network

install process.

You can use the scripts to perform any tasks you want—within the limitations of the

scripts themselves. However, post-install scripts are typically used to make minor

changes to network-installed software when you don’t want to create additional install

images. For example, you may use post-install scripts to delete files, set startup items,

or create a user after installing software on a client computer.

Note: One good use of post-install scripts is to alter items in the ~/Library/Preferences/

ByHost folder to ensure that settings in the original image persist or to override them.

For example, you can create a script to replace the MAC address in the names of items

in the ByHost folder with the MAC address of the computer on which the image has

been installed. In this way, any imaged computer will retain the settings (such as

display and print preferences) in the original image.

Post-install scripts work only with install images created from volumes mounted on

your computer; they cannot be used with install images created from CDs. Post-install

scripts must be written as shell scripts. Perl scripts are not supported.

To add post-install scripts to a new install image you’re creating using System Image

Utility, click the Add (+) button in the Contents pane and select the scripts you want

to add.

To add post-install scripts to an existing image, open System Image Utility, click Images,

and select the image in the list. Then click Edit, click the Add (+) button in the Contents

pane, and select the scripts you want to add.

When you create an install image with post-install scripts, System Image Utility copies

the scripts to the /var/db/emptyScriptFolder/ directory. The Network Install application

runs the scripts in the order that you add them to the image in System Image Utility.

The order of the scripts is recorded in the text file /private/etc/emptyScript, which

contains a list of the paths to each of the scripts. To change the order the scripts are

executed, edit the text file, which you can do by mounting the image on your server.

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Apple Mac OS X Server System Imaging and Software Update Administration For Version 10.4 or Later Bedienungsanleitung Seite 41