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Mastering Linux Security and Hardening

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

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Product type Paperback
Published in Feb 2023
Publisher Packt
ISBN-13 9781837630516
Length 618 pages
Edition 3rd Edition
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Author (1):
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Donald A. Tevault Donald A. Tevault
Author Profile Icon Donald A. Tevault
Donald A. Tevault
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Table of Contents (22) Chapters Close

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 2022https://opensource...

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