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64 Chapter 6. Red Hat Network Website
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 If a newer version of the package is already on the system, the package will not be installed on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 6.7.5 for more information.
The
Systems Affected page shows a list of systems affected by the Errata Alert.
6.6. Errata
RHN Enterprise customers who have their own private channel can issue Errata Alerts for their pack-
ages with the
Errata Manager
.
Click on the
Synopsis
to edit the Errata Alert, and click
Make a new errata
to generate a new errata.
Only Channel Administrators can generate Errata Alerts for an organization.
6.7. Channels and Packages
6.7.1. 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
that is associated with the Red Hat Linux 7.1 for the x86 architecture and that contains extra packages
needed only for the organization, such as a custom engineering application.