Red Hat NETWORK - USER REFERENCE GUIDE 2.0, Руководство пользователя

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58 Chapter 4. Red Hat Network Website
4.6. Software
If you click the
Software
tab on the top navigation bar, the
Software
category and links appear. The
pages in the
Software
category enable you to view and manage the channels and packages associated
with your systems. In addition, you can obtain ISO images here.
4.6.1. Channels
The Channels page is the first to appear in the Software category. A channel is a list of Red Hat
Linux packages grouped by use. Channels are used to choose packages to be installed on a system.
There are two types of channels:
base channels and child channels . A base channel consists of a list of
packages based on a specific architecture and Red Hat Linux release. For example, all the packages in
Red Hat Linux 7.1 for the x86 architecture is a base channel. The list of packages in Red Hat Linux 7.1
for the Itanium architecture is a different base channel. A child channel is a channel associated with
a base channel but contains extra packages. For example, an organization can create a child channel
associated with Red Hat Linux 7.1 for the x86 architecture that contains extra packages needed only
for the organization, such as a custom engineering application.
A system must be subscribed to one base channel only. This base channel is assigned automatically
during registration based upon the Red Hat Linux release and system architecture selected. In the case
of public free channels (RHL 6.2, 7.x, 8.0), the action will succeed. In the case of Advanced Server
and other paid base channels, this action will fail if an associated entitlement doesn’t exist.
A system can be subscribed to multiple child channels of its base channel. Only packages included in
a system’s subscribed channels can be installed or updated on that system. Some customers, such as
those using RHN Satellite and Proxy, have channel management authority. This authority, granted by
RHN as a separate role to certain customers, gives them the ability to create and manage their own
custom channels.
Channels can be further broken down by their relevance to your systems. Two such lists emerge:
Relevant and All .
4.6.1.1. Relevant Channels
As shown in Figure 4-6, the
Relevant Channels
page is shown by default when you click
Channels
in the left navigation bar. It displays a list of channels now associated with your systems. Links within
this list go to different tabs of the
Channel Details
page. Clicking on a channel name takes you to
the Details tab. Clicking on the packages number takes you to the Packages tab. And clicking on the
systems number takes you to the
Subscribed Systems
tab. Refer to Section 4.6.1.3 for details. The
Relevant page also contains links to ISO images. Refer to Section 4.6.3 for instructions.