Practical Linux or Unix Security
This PDF covers the following topics related to Linux/UNIX Security : Core security concepts, Maintaining confidentiality, Keeping our data safe from intruders, Integrity, Authentication, Security from the start, inetd vs. iptfw, Firewalling, Controlling your users, Cracklib, etc.
Author(s): Hervey Allen, Network Startup Resource Center
71 Pages 
Linux Administration I System and Users
This manual is an introduction to Linux system administration. It covers, after an introduction to the significance and problems of system administration, the basics of process, user account, and access control management, the management of disk partitions, file systems, and quotas, common boot loaders, the system start and shutdown process, PC hardware, and library and package management.
Author(s): The tuxcademy
238 Pages
Linux Administrators Security Guide
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
Practical UNIX Internet Security (S. Garfinkel, G. Spafford)
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
Linux Security HOWTO (K. Fenzi, D. Wreski)
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
Linux Security for Beginners (Neil A. Smyth)
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
Linux Firewall Configuration Packet Filtering and Netfilter/iptables (O. Andreasson)
We are working on the detailed description of this book, we will update this section soon.
Author(s):
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