Nokia Network Security Solutions Handbook
Your complete guide to Nokia IP network security solutions.
TABLE OF CONTENTS Nokia Network Security Solutions Handbook
Appendix A: UNIX Basics
Introduction
For readers who have little or no experience with UNIX, this appendix explains the basic concepts and commands to quickly get you up to speed with Nokia's (or any UNIX, for that matter) command-line interface. This foundation will also help you when you read some of the chapters in this book, most notably Chapter 8, "Advanced System Administration."
Here you will learn the basic form of the UNIX file system and how files and directories are a part of that system. We make our examples Nokia-specific where appropriate. You will also learn about the UNIX user and group permission concept and the commands that manipulate file ownership and access permissions. We round out this appendix with some sections on shell usage and basic shell utility commands and conclude with a section on Vi editor basics.
Understanding Files and Directories
When working with UNIX-based systems, you must understand the concepts of files and directories. This is no easy task, especially if you do not have a background or substantial training with UNIX or Linux. In this section, we look at the fundamentals you need to know to operate within the UNIX environment and demonstrate how to navigate through the file and directory structure. Let's begin with the basic concepts of the file and directory system.
The UNIX Directory Hierarchy:
With UNIX, the main concept of understanding files and directories is understanding their hierarchy. The hierarchy system is based on a tree. A tree has roots on the bottom that...
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