Network and SysAdmin, Scripting, Debugging, O.S. Books

[System Administration]

UNIX and Linux System Administration Handbook (4th Edition) by Evi Nemeth, Garth Snyder, Trent R. Hein and Ben Whaley (Jul 24, 2010)

Linux Administration Handbook by Trent R. Hein

Essential System Administration, Third Edition by Æleen Frisch (Aug 15, 2002)

Linux System Administration White Papers: A Compilation of Technical Documents for System Administrators by Olaf Kirch, Eric Raymond and Lars W. Wirzenius (Sep 20, 1999)

Linux in a Nutshell by Ellen Siever, Stephen Figgins, Robert Love and Arnold Robbins (Sep 29, 2009)

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[Network Administration]

Linux Network Administrator's Guide by Tony Bautts, Terry Dawson and Gregor N. Purdy (Feb 10, 2005)

LINUX Network Administrators Guide: 508 pages by Olaf Kirch and Terry Dawson (Jan 5, 2009)

The Accidental Administrator: Linux Server Step-by-Step Configuration Guide by Don R Crawley (Oct 27, 2010)

Linux TCP/IP Network Administration by Scott Mann (Jul 26, 2001)  TCP/IP stack understand, configure and troubleshoot servers

Linux Firewalls (3rd Edition) by Robert L. Ziegler

Linux Networking Cookbook by Carla Schroder

Internet Routing Architectures (2nd Edition) by Sam Halabi

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[Network and System Administration]

The Practice of System and Network Administration, Second Edition by Thomas A. Limoncelli, Christina J. Hogan and Strata R. Chalup (Jul 15, 2007)

Red Hat Linux Networking and System Administration by Terry Collings and Kurt Wall (Oct 21, 2005)

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[Troubleshooting]

Linux Troubleshooting Bible by Christopher Negus and Thomas Weeks (Jul 30, 2004)

Linux® Debugging and Performance Tuning: Tips and Techniques by Steve Best (Oct 20, 2005)

Debugging Embedded Linux (Digital Short Cut) by Christopher Hallinan (Aug 22, 2007)

Nmap Network Scanning: The Official Nmap Project Guide to Network and Security Scanning by Gordon Fyodor Lyon

Linux Troubleshooting for System Administrators and Power Users 2006

Malware Analyst's Cookbook and DVD: Tools and... by Michael Ligh

Hacking: The Art of Exploitation, 2nd Edition by Jon Erickson

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Wireshark Network Analysis: The Official Wireshark Certified Network Analyst Guide by Laura Chappell

The Art of Debugging with GDB, DDD, and Eclipse by Norman Matloff

Network Flow Analysis by Michael W. Lucas

Build Your Own Security Lab: A Field Guide for Network Field Testing. by Michael Gregg

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[Performance Tuning]

System Performance Tuning, 2nd Edition (O'Reilly System Administration) by Gian-Paolo D. Musumeci and Mike Loukides (Feb 2002)

Performance Tuning for Linux® Servers by Sandra K. Johnson, Gerrit Huizenga and Badari Pulavarty (Jun 6, 2005)

Optimizing Linux® Performance: A Hands-On Guide to Linux® Performance Tools by Phillip G. Ezolt (Mar 24, 2005)

Red Hat Linux Security and Optimization by Mohammed J. Kabir (Dec 1, 2001)

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[RHCE]

Red Hat® Certified Technician & Engineer (RHCT and RHCE) Training Guide and Administrator's Reference by Asghar Ghori (Aug 10, 2009)

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[Scripting]

Python for Unix and Linux System Administration by Noah Gift and Jeremy Jones (Aug 29, 2008)

Learning the bash Shell: Unix Shell Programming (In a Nutshell (O'Reilly)) by Bill Rosenblatt

Practical Guide to Linux Commands, Editors, and Shell Programming, A (2nd Edition) by Mark G. Sobell (Nov 29, 2009)

Linux Command Line and Shell Scripting Bible, Second Edition by Richard Blum and Christine Bresnahan (Apr 12, 2011)

Automating Linux and Unix System Administration (Expert's Voice in Linux) by Nathan Campi and Kirk Bauer (Dec 24, 2008)

Linux Command Line and Shell Scripting Bible, Second Edition by Richard Blum

Regular Expressions Cookbook by Jan Goyvaerts

Perl Best Practices by Damian Conway

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[Linux Operating System]

Modern Operating Systems (3rd Edition) by Andrew S. Tanenbaum

Professional Linux Kernel Architecture (Wrox... by Wolfgang Mauerer

Understanding the Linux Kernel, Third Edition by Daniel P. Bovet

Understanding Linux Network Internals by Christian Benvenuti

Linux Kernel Development (3rd Edition) by Robert Love

Linux System Programming: Talking Directly to the Kernel and C Library. by Robert Love

Linux Device Drivers, 3rd Edition by Jonathan Corbet

Write Great Code: Volume 1: Understanding the Machine by Randall Hyde

IA-64 Linux Kernel: Design and Implementation by David Mosberger

x86 Instruction Set Architecture by Tom Shanley

Windows® Internals: Including Windows Server... by Mark Russinovich

A Guide to Kernel Exploitation: Attacking the core. by Enrico Perla B.Sc. C

UNIX® Systems for Modern Architectures: Symmetric Multiprocessing and Caching for Kernel Developers. by Curt Schimmel

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[Parallel and Multi threading]

Synchronization Algorithms and Concurrent Programming. by Gadi Taubenfeld

The Art of Concurrency: A Thread Monkey's Guide to Parallel Applications.. by Clay Breshears

The Practice of Parallel Programming by Sergey A. Babkin

Professional Multicore Programming: Design and Implementation for C++ Developers (Wrox). by Cameron Hughes

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[Enterprise]

Event-Driven Architecture: How SOA Enables the Real Time Enterprise. by Hugh Taylor

SOA in Practice: The Art of Distributed System design. by Nicolai M. Josuttis

SOA Design Patterns (The Prentice Hall Service-Oriented Computing Series from Thomas Erl) by Thomas Erl Hardcover

SOA Principles of Service Design by Thomas Erl

Enterprise Integration Patterns: Designing, Building and Deploying Messaging Solutions. by Gregor Hohpe

Restful Web Services by Leonard Richardson

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Understand Source Code by Reading Code and Refactoring for Maintaining Large Projects

This list consists of one-liner tips to be used for easy lookup and reference.

Rewriting Code for Better Understanding (Coding Horror)

• What I cannot create, I do not understand. [Richard Feynman]
• "What I do not create, I do not understand."[Chris]
• "It's easier to understand 600 tables than 100,000 lines of code." [PaulC on comp.databases.theory/2005]
• Create a new project with blocks of code copied from old code. Refactor to reduce "old code smell"
• Start refactoring by adding small tests to better understand code and act as regression tests.
• Just scan through huge amounts of code till it starts making sense - "understand by constant exposure".
• Create a text file to capture your understanding - briefly describe how the component works, realtions to other components, what it persists, its states, and source browsing/debugging tips you found useful.
• Manually reformat a copy of the code - white space, and indented as per your personal style.

References:

1. Working Effectively with Legacy Code
2. Object Oriented Reengineering Patterns
3. Refactoring: Improving the Design of Existing Code