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Lesson 1

Introduction to RedHat Linux System Administration

You know about Linux installation and user management.
The next step is to control your network.
In this course, you will discover the tools available to manage your desktop, network, and system resources.

RedHat Linux

Red Hat is the world's leading open source and Linux provider and is headquartered in Raleigh, NC with satellite offices worldwide.
Ubuntu is currently the leading Linux distribution.
Red Hat provides operating system platforms along with middleware, applications, and management solutions.

IP Net works versus non-IP Net works

Most modern networks fall into one of two very broad categories: IP based networks. These are all networks that communicate via Internet Protocol addresses, which is the standard for the Internet and for most internal networks today. This generally includes Ethernet, Cable Modems, DSL Modems, dial up modems, Wi-Fi, VPN connections and more.
Then there are non-IP based networks. These are usually very specific niche networks, but one in particular has grown in usage enough to warrant mention here and that is InfiniBand. Because InfiniBand is not an IP network, many features and configurations normally used on IP networks are not applicable to InfiniBand.

1.1. What are Kickstart Installations?

Many system administrators would prefer to use an automated installation method to install Red Hat Enterprise Linux on their machines. Red Hat, Inc created the kickstart installation method. Using kickstart, a system administrator can create a single file containing the answers to all the questions that would normally be asked during a typical installation. Kickstart files can be kept on a single server system and read by individual computers during the installation. This installation method can support the use of a single kickstart file to install Red Hat Enterprise Linux on multiple machines, making it ideal for network and system administrators. Kickstart provides a way for users to automate a Red Hat Enterprise Linux installation.