Red Hat Linux consists of various software applications and utilities, known as
RPM packages. A package is just a file that
contains a software program.
This chapter explains three ways to update your system: using Red Hat Network,
using the online Errata List, and using the Red Hat Linux Installation CD-ROMs.
15.1. Red Hat Network
Red Hat Network is an Internet solution for managing one or more Red Hat Linux systems.
All Security Alerts, Bug Fix Alerts, and Enhancement Alerts
(collectively known as Errata Alerts) can be downloaded directly from
Red Hat using the Red Hat Update Agent standalone application
or through the RHN website available at http://rhn.redhat.com/.
Red Hat Network saves users time because they receive email when updated packages are
released. Users do not have to search the Web for updated packages or
security alerts. By default, Red Hat Network installs the packages as well. Users do
not have to learn how to use RPM or worry about resolving software package
dependencies; RHN does it all.
Each Red Hat Network account comes with:
Errata Alerts — learn when Security Alerts, Bug Fix Alerts,
and Enhancement Alerts are issued for all the systems in your
network through the Basic interface
Figure 15-2. Relevant Errata
Automatic email notifications — receive an email
notification when an Errata Alert is issued for your system
Scheduled Errata Updates — schedule delivery of
Package installation — Schedule package installation on one
or more systems with the click of a button
Red Hat Update Agent — use the
Red Hat Update Agent to download the latest software
packages for your system (with optional package installation)
Red Hat Network website — manage multiple systems, downloaded
individual packages, and schedule actions such as Errata Updates
through a secure Web browser connection from any computer
To start using Red Hat Network, follow these three basic steps:
Create a System Profile using one of the following methods:
Registering the system with RHN during the
Setup Agent the first time your system
boots after installation.
on your desktop.
Execute the command up2date from a shell
Log in to RHN at http://rhn.redhat.com/ and
entitle the system to a service offering. Everyone receives a free
Red Hat Network account for one system. Additional accounts can be purchased.
Start scheduling updates through the RHN website or download and install
Errata Updates with the Red Hat Update Agent.
For more detailed instructions, read the Red Hat Network User Reference
Guide available at http://www.redhat.com/docs/manuals/RHNetwork/.
Red Hat Linux includes the Red Hat Network Notification Tool,
a convenient panel icon that displays visible
alerts when there is an update for your Red Hat Linux system. Refer to the
following URL for more information about the applet: http://rhn.redhat.com/help/basic/applet.html