Two-Minute Drill


Here are some of the key points from the certification objectives in Chapter 5.

The Red Hat Package Manager

  

The RPM database tracks where each file in a package is located, its version, and much more.

  

Verifying an installed package confirms the integrity based on the RPM database.

  

The Install mode of RPM installs RPM packages on your system; a newly installed kernel is loaded side by side with a previously installed kernel.

  

The Upgrade mode of RPM replaces the old version of the package with the new one.

More RPM Commands

  

The rpm -e command (erase) removes a package from your system.

  

The rpm command query mode (-q) determines whether packages are installed on your system or files are associated with a particular package.

  

Source RPMs, as the name indicates, contain the source code used to build architecture-specific packages.

  

The spec file loaded in /usr/src/redhat/SPECS/packagename.spec controls the way a package is built and what actions are performed when it is installed or removed from a system.

  

Run rpmbuild -ba packagename.spec to build your binary and source RPM.

Managing Updates with Pup and the Red Hat Network

  

Before connecting to the RHN, you need to register your system.

  

The Package Updater, Pup, can help you keep systems up to date.

  

With automatic dependency resolution, yum and the RHN help install dependencies along with desired packages.

  

The RHN can help you manage subscribed systems remotely using a Web-based interface.

Adding and Removing RPM Packages with yum and pirut

  

The yum command can help install a group of packages from the RHN or repositories configured in the /etc/yum.repos.d directory.

  

The pirut tool can help you add and remove packages and complete package groups from your system.

Using Kickstart to Automate Installation

  

Kickstart is Red Hat's solution for an automated simultaneous installation on several computers.

  

Kickstart installations can be configured to take installation files from a CD-ROM, a local drive, an NFS, an FTP, or an HTTP server.

  

There are two ways to create a kickstart file: from the configuration when you installed Linux as documented in the /root/anaconda-ks.cfg file, or from the GUI Kickstart Configurator.



RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302)
Linux Patch Management: Keeping Linux Systems Up To Date
ISBN: 0132366754
EAN: 2147483647
Year: 2004
Pages: 227
Authors: Michael Jang

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