Chapter 6. Red Hat Network Website 129None takes you to the Action Details page. This column corresponds to one on the Erratatab of the System Details page.6.5.3. Advanced SearchThe Advanced Search page allows you to search through Errata according to specificcriteria, such as summary, advisory, and package name. Type a keyword, select the criterionto search by, and click the Search button. The results appear at the bottom of the page.6.6. ChannelsIf you click the Channels tab on the top navigation bar, the Channels category and linksappear. The pages in the Channels category enable you to view and manage the channelsand packages associated with your systems. In addition, you can obtain ISO images here.6.6.1. Software ChannelsThe Software Channels page is the first to appear in the Channels category. A softwarechannel is a list of Red Hat Enterprise Linux packages grouped by use. Channels are usedto choose packages to be installed on a system.There are two types of software channels: base channels and child channels. A base chan-nel consists of a list of packages based on a specific architecture and Red Hat EnterpriseLinux release. For example, all of the packages in Red Hat Enterprise Linux 2.1 for the x86architecture make up a base channel. The list of packages in Red Hat Enterprise Linux 2.1for the Itanium architecture make up a different base channel. A child channel is a channelassociated with a base channel that contains extra packages. For instance, an organizationcan create a child channel associated with Red Hat Enterprise Linux 2.1 for the x86 ar-chitecture that contains extra packages needed only for the organization, such as a customengineering application.A system must be subscribed to one base channel only. This base channel is assignedautomatically during registration based upon the Red Hat Enterprise Linux release andsystem architecture selected. In the case of public free channels, the action will succeed.In the case of paid base channels, this action will fail if an associated entitlement doesn’texist.A system can be subscribed to multiple child channels of its base channel. Only packagesincluded in a system’s subscribed channels can be installed or updated on that system.Further, RHN Satellite Server and RHN Proxy Server customers have channel managementauthority. This authority gives them the ability to create and manage their own customchannels. Refer to the RHN Channel Management Guide for details.
