You're reading from Mastering Linux Security and Hardening A practical guide to protecting your Linux system from cyber attacks

Product type Paperback

Published in Feb 2023

Publisher Packt

ISBN-13 9781837630516

Length 618 pages

Edition 3rd Edition

Languages

Tools

Linux

Concepts

Hardening

Author (1):

Donald A. Tevault

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Table of Contents (22) Chapters

Preface

1. Section 1: Setting up a Secure Linux System

2. Running Linux in a Virtual Environment FREE CHAPTER

3. Securing Administrative User Accounts

4. Securing Normal User Accounts

5. Securing Your Server with a Firewall – Part 1

6. Securing Your Server with a Firewall — Part 2

7. Encryption Technologies

8. SSH Hardening

9. Section 2: Mastering File and Directory Access Control (DAC)

10. Mastering Discretionary Access Control

11. Access Control Lists and Shared Directory Management

12. Section 3: Advanced System Hardening Techniques

13. Implementing Mandatory Access Control with SELinux and AppArmor

14. Kernel Hardening and Process Isolation

15. Scanning, Auditing, and Hardening

16. Logging and Log Security

17. Vulnerability Scanning and Intrusion Detection

18. Prevent Unwanted Programs from Running

19. Security Tips and Tricks for the Busy Bee

20. Other Books You May Enjoy

21. Index

New sudo features

I mentioned before that one of the beautiful things about sudo is that it allows you to see what users are doing with their sudo privileges. Beginning with sudo version 1.9.0, the sudo logging experience has been greatly enhanced. You can now save sudo log messages in JSON format, which allows sudo to log much more information than it normally would, in a format that’s easier to parse. Beginning with sudo version 1.9.4, you can also have sudo send its log messages to a central log server, making it more difficult for bad actors to delete mention of their dirty deeds from the system log files.

Unfortunately, space constraints don’t allow me to do a full write-up about these new features here. That’s okay, though. Over at https://opensource.com/, Mr. Peter Czanik has written a great article that explains them very well. So, I’ll just refer you to him:

5 new sudo features sysadmins need to know in 2022– https://opensource...