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Mastering Linux Security and Hardening

You're reading from Mastering Linux Security and Hardening Secure your Linux server and protect it from intruders, malware attacks, and other external threats

Product type Paperback

Published in Jan 2018

Publisher

ISBN-13 9781788620307

Length 376 pages

Edition 1st Edition

Tools

Linux

Concepts

Cybersecurity

Author (1):

Donald A. Tevault

View More author details

Table of Contents (12) Chapters

Preface

1. Running Linux in a Virtual Environment FREE CHAPTER

2. Securing User Accounts

3. Securing Your Server with a Firewall

4. Encrypting and SSH Hardening

5. Mastering Discretionary Access Control

6. Access Control Lists and Shared Directory Management

7. Implementing Mandatory Access Control with SELinux and AppArmor

8. Scanning, Auditing, and Hardening

9. Vulnerability Scanning and Intrusion Detection

10. Security Tips and Tricks for the Busy Bee

11. Other Books You May Enjoy

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Locking down users' home directories the Debian/Ubuntu way

Debian and its offspring, such as Ubuntu, have two user creation utilities:

useradd on Debian/Ubuntu
adduser on Debian/Ubuntu

useradd on Debian/Ubuntu

The useradd utility is there, but Debian and Ubuntu don't come with the handy preconfigured defaults as Red Hat and CentOS do. If you were to just do sudo useradd frank on a default Debian/Ubuntu machine, Frank would have no home directory and would be assigned the wrong default shell. So, to create a user account with useradd on a Debian or Ubuntu system, the command would look something like:

sudo useradd -m -d /home/frank -s /bin/bash frank

In this command:

-m creates the home directory.
-d specifies...

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Authors (1)

Donald A. Tevault

Donald A. Tevault

Donald A. Tevault - but you can call him Donnie - got involved with Linux way back in 2006, and has been working with it ever since. He holds the Linux Professional Institute Level 3-Security certification, and the GIAC Incident Handler certification. Donnie is a professional Linux trainer, and thanks to the magic of the internet, teaches Linux classes literally the world over from the comfort of his living room. He's also a Linux security researcher for an IoT security company.

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