The BIOS Initialization Sequence

A basic understanding of the BIOS is a fundamental skill for all serious computer users. While many modern computers allow you to boot directly from the media of your choice, such as an RHEL 5 installation CD or a rescue USB key, that may not be possible during your troubleshooting. Therefore, you need to know how to modify the BIOS menu to boot from
the media of your choice.

KVM Red Hat Enterprise Linux

Red Hat announced a few months ago the release of Red Hat Enterprise Linux 5.4, a new major point update of the company's popular commercial Linux distribution. This version introduces official support for KVM and marks an important milestone in Red Hat's gradual transition away from Xen. KVM, the Kernel-based Virtual Machine, is an open source framework that brings native full virtualization to the Linux kernel. It is primarily designed for the x86 architecture (though others are supported) and takes advantage of processor virtualization extensions. It has been part of the mainline Linux kernel since 2.6.20 and has become the favored virtualization solution of the upstream kernel community.

PXE Booting

Most modern systems include some sort of network boot card and a BIOS that can take advantage of that capability. As a wide variety of options are available from the boot menu, they are not all described here.

Cluster installation video

Directory Server 8.1 is comprised of several components, which work in tandem:

• The Directory Server is the core LDAP server daemon. It is compliant with LDAP v3 standards. This component includes command-line server  management and administration programs and scripts for common operations like export and backing up databases.

• The Directory Server Console is the user interface that simplifies managing users, groups, and other LDAP data for your enterprise. The Console is used for all aspects of server management, including making backups; configuring security, replication, and databases; adding entries; and monitoring
servers and viewing statistics.

• The Administration Server is the management agent which administers Directory Servers. It communicates with the Directory Server Console and performs operations on the Directory Server instances. It also provides a simple HTML interface and on-line help pages. There must be one Administration Server running on each machine which has a Directory Server instance running on it.

Certified Engineer

RedhatIn this article we will talk about RHCE prerequisites. For the RHCE and RHCT exams, the skills outlined in this article are generally minimum requirements. For example, while you may prefer to use an editor other than vi, you may not have access to the GUI, and therefore need to know how to use a console-based text editor on at least the Troubleshooting and System Maintenance section of the exam. While you're not required to know how to pipe the output of dmesg to the less command, this is a useful tool that can help you identify problems.Critical to a Linux administrator is knowledge of one or more text editors to manage the many configuration files on a Linux system. The Linux filesystem hierarchy organizes hardware, drivers, directories, and, of course, files.

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