System Administration

Build Virtual Network Labs Using Cisco, Juniper, and More

Building a Mail Server with Courier and Cyrus

A No-Nonsense Guide to the OpenBSD Firewall

Router and Switch Management, the Easy Way

An Introduction to Kernel Hacking

Manage Aging Computer Systems (and Future Proof Modern Ones)

Attack Detection and Response with iptables, psad, and fwsnort

System and Network Monitoring

An Essential Guide for the Accidental Admin

Code Secure and Reliable Network Services from Scratch

Workflow Automation Made Easy

A User's Guide to the End of the World

Using Wireshark to Solve Real-World Network Problems

A Comprehensive, Illustrated Internet Protocols Reference

101 Scripts for Linux, OS X, and UNIX Systems