Red Hat NETWORK BASIC - USER REFERENCE GUIDE 3.3, Руководство пользователя

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Chapter 6. Red Hat Network Website 63
2. To apply a specific Errata Update to one or more systems, click on
Errata
on the left navigation
bar and use the All Errata , Applicable Errata , or Errata Search page to find the Errata Update
that you want to apply. From the Errata List, click on the
Synopsis
for the Errata Alert to display
a summary of it. Click on the Systems Affected tab, and select the systems that you want to
apply this update to. Click
Update Selected Systems
to apply the Errata Update to all selected
systems, or click Update All Affected Entitled Systems to apply the update to all the affected
systems listed.
Important
If you choose to apply Errata Updates automatically, the packages will be installed via the RHN
Daemon. You must have the RHN Daemon enabled on your systems. Refer to Chapter 7 for more
details.
The following rules apply to Errata Updates:
1. Each package is a member of one or more channels. If a selected system is not subscribed to
the channel that the selected package is a member of, the package will not be installed on that
system.
2. If a newer version of the package is already on the system, the package will not be installed on
that system.
3. If an older version of the package is installed, the package will be upgraded.
The packages will be updated by the RHN Daemon. You must have the RHN Daemon enabled on
your systems. Refer to Chapter 7 for more details.
6.5.5. Errata Details
If you click on the synopsis of an Errata Alert, the
Errata Details
page for the Errata Alert will appear.
This page is further divided into two tabbed pages:
Details
and
Systems Affected
.
The Details page provides the Errata Report issued by Red Hat. It describes what channels the Errata
Alert affects, its problem and solution, MD5 verification for each of the packages, and the packages
required for the Errata Update. Clicking on the RPM package name displays the Package Details
page for the package. Refer to Section 6.6.5 for more information.
The
Systems Affected page shows a list of systems affected by the Errata Alert.
6.6. Channels and Packages
6.6.1. Channel List
A channel is a list of Red Hat Linux packages. 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