Book Description

Nagios is a tool for system and network monitoring. It constantly checks other machines and various services on those machines. The main purpose of system monitoring is to detect and report any system not working properly as soon as possible so that you are aware of problems before a user runs into them. It is a modular and flexible solution that uses plug-ins to do its job.

The book is an introduction to Nagios that will teach readers to use Nagios with its advanced features. At the same time, readers who have already used earlier versions of Nagios will also benefit because they will learn about the new and advanced features of Nagios 3.

This book focuses on the new features of Nagios and will teach readers to secure their systems in a much improved manner.

What you will learn from this book

• Understand system monitoring and how Nagios works
• Install and configure Nagios to administer your network and system
• Deploy agents and plug-ins, and monitor assets with advanced features of Nagios
• Notify users of current and future incidents to protect the availability, performance, and security of monitored assets
• Configure and work your way around Nagios’s web interface
• Pass service and host check results over the network using NSCA Download Now »

Book Description

For Computer Systems, Computer Organization and Architecture courses in CS, EE, and ECE departments.

Few students studying computer science or computer engineering will ever have the opportunity to build a computer system. On the other hand, most students will be required to use and program computers on a near daily basis. Computer Systems: A Programmer’s Perspective introduces the important and enduring concepts that underlie computer systems by showing how these ideas affect the correctness, performance, and utility of application programs. The text’s hands-on approach (including a comprehensive set of labs) helps students understand the “under-the-hood” operation of a modern computer system and prepares them for future courses in systems topics such as compilers, computer architecture, operating systems, and networking.

Table of Contents
Chapter 1. A Tour of Computer Systems

Part I: Program Structure and Execution
Chapter 2. Representing and Manipulating Information
Chapter 3. Machine-Level Representation of Programs
Chapter 4. Processor Architecture
Chapter 5. Optimizing Program Performance
Chapter 6. The Memory Hierarchy Download Now »

Book Description

Ubuntu Unleashed is filled with unique and advanced information for everyone who wants to make the most of the Ubuntu Linux operating system. This new edition has been thoroughly revised and updated by a long-time Ubuntu community leader to reflect the exciting new Ubuntu 11.10 (“Oneiric Ocelot”) and the forthcoming Ubuntu 12.04.

Former Ubuntu Forum administrator Matthew Helmke covers all you need to know about Ubuntu 11.10/12.04 installation, configuration, productivity, multimedia, development, system administration, server operations, networking, virtualization, security, DevOps, and more—including intermediate-to-advanced techniques you won’t find in any other book.

Helmke presents up-to-the-minute introductions to Ubuntu’s key productivity and Web development tools, programming languages, hardware support, and more. You’ll find brand-new coverage of the new Unity desktop, new NoSQL database support and Android mobile development tools, and many other Ubuntu 11.10/12.04 innovations. Whether you’re new to Ubuntu or already a power user, you’ll turn to this book constantly: for new techniques, new solutions, and new ways to do even more with Ubuntu!

Matthew Helmke served from 2006 to 2011 on the Ubuntu Forum Council, providing leadership and oversight of the Ubuntu Forums, and spent two years on the Ubuntu regional membership approval board for Europe, the Middle East, and Africa. He has written about Ubuntu for several magazines and websites, is a lead author of The Official Ubuntu Book. He works for The iPlant Collaborative, which is funded by the National Science Foundation Download Now »

Book Description

Addressing the fundamental technologies and theories associated with designing complex communications systems and networks, Principles of Communications Networks and Systemsprovides models and analytical methods for evaluating their performance. Including both the physical layer (digital transmission and modulation) and networking topics, the quality of service concepts belonging to the different layers of the protocol stack are interrelated to form a comprehensive picture.

The book is designed to present the material in an accessible but rigorous manner. It jointly addresses networking and transmission aspects following a unified approach and using a bottom up style of presentation, starting from requirements on transmission links all the way up to the corresponding quality of service at network and application layers. The focus is on presenting the material in an integrated and systematic fashion so that students will have a clear view of all the principal aspects and of how they interconnect with each other.

• A comprehensive introduction to communications systems and networks, addressing both network and transmission topics
• Structured for effective learning, with basic principles and technologies being introduced before more advanced ones are explained
• Features examples of existing systems and recent standards as well as advanced digital modulation techniques such as CDMA and OFDM
• Contains tools to help the reader in the design and performance analysis Download Now »

Book Description

You’ve experienced the shiny, point-and-click surface of your Linux computer—now dive below and explore its depths with the power of the command line.

The Linux Command Line takes you from your very first terminal keystrokes to writing full programs in Bash, the most popular Linux shell. Along the way you’ll learn the timeless skills handed down by generations of gray-bearded, mouse-shunning gurus: file navigation, environment configuration, command chaining, pattern matching with regular expressions, and more.

In addition to that practical knowledge, author William Shotts reveals the philosophy behind these tools and the rich heritage that your desktop Linux machine has inherited from Unix supercomputers of yore.

As you make your way through the book’s short, easily-digestible chapters, you’ll learn how to:

• Create and delete files, directories, and symlinks
• Administer your system, including networking, package installation, and process management
• Use standard input and output, redirection, and pipelines
• Edit files with Vi, the world’s most popular text editor
• Write shell scripts to automate common or boring tasks
• Slice and dice text files with cut, paste, grep, patch, and sed

Once you overcome your initial “shell shock,” you’ll find Download Now »

Book Description

OS X and iOS Kernel Programming combines essential operating system and kernel architecture knowledge with a highly practical approach that will help you write effective kernel-level code. You’ll learn fundamental concepts such as memory management and thread synchronization, as well as the I/O Kit framework. You’ll also learn how to write your own kernel-level extensions, such as device drivers for USB and Thunderbolt devices, including networking, storage and audio drivers.

OS X and iOS Kernel Programming provides an incisive and complete introduction to the XNU kernel, which runs iPhones, iPads, iPods, and Mac OS X servers and clients. Then, you’ll expand your horizons to examine Mac OS X and iOS system architecture. Understanding Apple’s operating systems will allow you to write efficient device drivers, such as those covered in the book, using I/O Kit.

With OS X and iOS Kernel Programming, you’ll:

• Discover classical kernel architecture topics such as memory management and thread synchronization
• Become well-versed in the intricacies of the kernel development process by applying kernel debugging and profiling tools
• Learn how to deploy your kernel-level projects and how to successfully package them
• Write code that interacts with hardware devices
• Examine easy to understand example code that can also be used in your own projects Download Now »