Book Image

Practical Linux Security Cookbook - Second Edition

By : Tajinder Kalsi
Book Image

Practical Linux Security Cookbook - Second Edition

By: Tajinder Kalsi

Overview of this book

Over the last few years, system security has gained a lot of momentum and software professionals are focusing heavily on it. Linux is often treated as a highly secure operating system. However, the reality is that Linux has its share of security ?aws, and these security ?aws allow attackers to get into your system and modify or even destroy your important data. But there’s no need to panic, since there are various mechanisms by which these ?aws can be removed, and this book will help you learn about different types of Linux security to create a more secure Linux system. With a step-by-step recipe approach, the book starts by introducing you to various threats to Linux systems. Then, this book will walk you through customizing the Linux kernel and securing local files. Next, you will move on to managing user authentication both locally and remotely and mitigating network attacks. Later, you will learn about application security and kernel vulnerabilities. You will also learn about patching Bash vulnerability, packet filtering, handling incidents, and monitoring system logs. Finally, you will learn about auditing using system services and performing vulnerability scanning on Linux. By the end of this book, you will be able to secure your Linux systems and create a robust environment.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Contributors
Packt Upsell
Preface
Index

Digital Evidence and Forensic Toolkit  (DEFT)


While performing computer forensics, it is important that the software being used is able to ensure the integrity of file structures. It should also be able to analyze the system being investigated, without any alteration, deletion, or change of data.

DEFT is designed for forensics and is based on Lubuntu, which is itself based on Ubuntu.

DEFT can be downloaded from this link: http://www.deftlinux.net/download/.

Once downloaded, we can burn the image file on CD/DVD media or create a live bootable USB media.

To use DEFT, we need to get an overview about what is included in the OS and we will do that next.

Once we boot the DEFT CD/DVD or USB media, we get the boot screen. Firstly, we need to select the language. Once done, we can choose to either run DEFT live or else we can install DEFT on our system.

In our example, we have chosen to boot DEFT live. We should be presented with the DEFT desktop after the boot process completes.

Now let's understand what...