Linux Newbie Administrator Guide
by Stan, Peter and Marie Klimas
Number of pages: 184
A complete reference for new Linux users who wish to set up and administer their own Linux home computer, workstation or their home or small office network. The answers are meant to be simple, with just sufficient detail, and always supported with a readily usable example.
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by Oskar Andreasson - Linuxtopia
This document gives a good and simple primer at how to get started with iptables. The text requires some previous knowledge about Linux/Unix, shell scripting, as well as how to compile your own kernel, and some knowledge about the kernel internals.
by Martin A. Brown
This guide provides an overview of many of the tools available for IP network administration of the linux operating system. It covers Ethernet, ARP, IP routing, NAT, and other topics central to the management of IP networks.
by Bert Hubert, at al.
This document hopes to enlighten you on how to do more with Linux 2.2/2.4 routing. You already run tools which allow you to do spectacular things. Commands like route and ifconfig are wrappers for the very powerful iproute2 infrastructure.
by Kurt Seifried - Linuxtopia
The guide introduces computer security, Linux installation, physical and console security, administration, backup, file security, authentication, logging, attack detection, firewalling, network security, software management, encryption, viruses, etc.