Red Hat NETWORK 2.6, Руководство пользователя

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88 Glossary
C
Channel
A channel is a list of Red Hat Linux packages. Channels are used to choose packages to be
installed from client systems. Every client system must be subscribed to one Base Channel and
can be subscribed to one or more Child Channel .
Child Channel
A child channel is a Channel associated with a Base Channel but contains extra packages.
Client System
See Registered System .
D
Digital Certificate
A client component in XML format that is stored in the
/etc/sysconfig/rhn/systemid
file
on registered systems. Red Hat Network verifies this certificate to authenticate the registered
system before each connection. This certificate is issued by Red Hat and passed to the system
as part of the registration process. It includes unique information about the registered system to
avoid fraudulent use.
E
Email Notification
Similar to an Errata Alert , except the information is delivered via email. If the email notifi-
cations option is selected, notifications are sent for every Red Hat Network Errata Alert . The
email includes the type of Errata Alert, summary of the Errata, description of the Errata, and a
list of which systems are affected by the report.
Enhancement Alert
An Errata Alert that pertains to a package enhancement request.
Enterprise
One of the RHN service level offering. It has more features than the Basic service level, including
user management, system groups, and enhanced system details.