Book Image

Linux Utilities Cookbook

By : James Kent Lewis
Book Image

Linux Utilities Cookbook

By: James Kent Lewis

Overview of this book

<p>Linux is a stable, reliable and extremely powerful operating system. It has been around for many years, however, most people still don't know what it can do and the ways it is superior to other operating systems. Many people want to get started with Linux for greater control and security, but getting started can be time consuming and complicated. <br /><br />A practical, hands-on guide that provides you with a number of clear step-by-step examples to help you solve many of the questions that crop up when using an operating system you may not be familiar with.</p> <p>Presenting solutions to the most common Linux problems in a clear and concise way, this helpful guide starts with spicing up the terminal sessions by command retrieval and line editing, and shell prompt variables. We will then get to know the different desktops (GUIs) available for Linux systems and which is the best fit for you. We will then explore the world of managing files and directories, connectivity, and what to do when it goes wrong. We will also learn a range of skills, from creating and managing user accounts to securing your system, managing and limiting processes, and letting information flow from one process to another using pipes. Later, we will master disk management, working with scripts and automating tasks quickly, and finally, understand the need for a custom kernel and tips on how to build one.</p> <p><br />Based on the author's extensive experience, there is a section on best practices that every Linux user should be familiar with.</p>
Table of Contents (19 chapters)
Linux Utilities Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

IPv4 versus IPv6


As of the writing of this book, Internet Protocol Version 4 (IPv4)is used to route most of the network traffic on the Internet. It uses 32-bit (4 byte) addresses, which allows for a space of 232 addresses. Under IPv4, there are not enough addresses remaining to accommodate all of the Internet devices now in use, which is why IPv6 was created. In this section we will first run some commands and then discuss IPv4 and IPv6.

How to do it...

Let's try some commands using both protocols:

  1. Let's start with IPv4. Run the following command:

    ping 192.168.1.115
    
  2. Then, run the following command:

    ssh 192.168.1.115
    
  3. Now let's try IPv6. First let's see if your computer has an IPv6 address. Run ifconfig on your interface; on my laptop it's ifconfig wlan0.

  4. You should see something like the following output:

    inet 192.168.1.115  netmask 255.255.255.0  broadcast 192.168.1.255
    
  5. You should also see something like the following output: inet6 2002:244:b303:0:221:5eff:feff:f15d. Try pinging it. On mine...