Red Hat NETWORK 3.6 - Technické informace stáhnout pdf (Strana 85)

Chapter 6. Red Hat Network Website 73

6.4.2.6.4.1. System Details Channels Software

Software channels provide a well-deﬁned method to determine which packages should be available

to a system for installation or upgrade, based upon its operating systems, packages and, functionality.

Click a channel name to view its Channel Details page. To modify the child channels associated with

this system, use the checkboxes next to the channels and click the Change Subscriptions button. You

will receive a success message or be notiﬁed of any errors. To change the system’s base channel, select

the new one from the pulldown menu and click the Modify Base Channel button. Refer to Section

6.6.1 Software Channels for more information.

6.4.2.6.4.2. System Details

Channels Conﬁguration —

Assists in managing the conﬁguration of the system. Like software channels, conﬁguration channels

store ﬁles to be installed on systems. Unlike software packages, various versions of conﬁguration ﬁles

may prove useful to a system at any given time.

To manage the conﬁguration of a system, it must have the latest rhncfg* packages installed and

the configfiles/ directory and associated ﬁles created on it. Refer to Section 6.6.6.1 Preparing

Systems for Conﬁg Management for instructions. Command line options also exist for many of these

functions. Refer to Appendix A Command Line Conﬁg Management Tools for instructions.

Here are the options available within the system’s Conﬁguration tab, each of which results in a

separate subtab:

• Managed Files — List all conﬁguration ﬁles currently associated with the system. The Overrides

column identiﬁes which conﬁg ﬁle from which channel will apply if the system is unsubscribed

from the conﬁg channel that provides the ﬁle now. For instance, if a system has ’/etc/foo’ from

channel ’bar’ and ’/etc/foo’ from channel ’baz’ is in the Overrides column, then unsubscribing

from channel ’bar’ will mean that the ﬁle from channel ’baz’ will be applicable. Also, if nothing

is in the ’Overrides’ column for a given ﬁle path, then unsubscribing from the channel providing

the ﬁle will mean that the ﬁle is no longer managed (though it will (not remove the ﬁle from the

system).

• Verify — Validate the conﬁguration ﬁles installed on the system by comparing them to versions

stored in RHN’s central conﬁguration manager. Select the ﬁles to be veriﬁed and click Verify.

• Conﬁg Channels — Set the subscription and rank of conﬁguration channels that may be associated

with the system, lowest ﬁrst. Enter numbers in the Rank ﬁelds to establish the order in which

channels are used. Channels with no numeric value are not associated with the system. Your local

conﬁguration channel will always override all other channels for this system and therefore cannot

have its rank adjusted from 1. All other channels are created in the Manage Conﬁg Channels

interface within the Channels category. Refer to Section 6.6.6 Manage Conﬁg Channels —

for

instructions. When satisﬁed, click Update.

• Local Overrides — View and manage the default conﬁguration ﬁles for the system. If no ﬁles

exist, click the add, edit, or remove ﬁles link within the description to access the system’s Conﬁg

Channel Files page. If a ﬁle exists, click its name to go to the Conﬁguration File Details page.

Refer to Section 6.6.6.6 Conﬁguration File Details —

for instructions. To replicate the ﬁle

within a conﬁg channel, select its checkbox, click the Copy to Conﬁg Channel button, and select

the destination channel. To remove a ﬁle, select it and click Delete Selected Files.

• Sandbox — Manipulate conﬁguration ﬁles without deploying them. This sandbox provides you

with an area to experiment with ﬁles without affecting systems. To add ﬁles, click the import new

ﬁles link, select an option for their addition from the dropdown menu, and click Go. Ensure you

have the latest rhncfg* packages. The rest of the functions work like those on the Local Overrides

subtab.

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