Beginning Portable Shell Scripting From Novice to Professional

About This Book
This book is about programming in the Bourne shell and its derivatives; the Korn shell, the
Bourne-­ gain shell, and the POSIX shell are among the most obvious relatives. This book does a not cover the many other UNIX and UNIX-­ ike shells, such as Plan 9’s rc, or the Berkeley csh.

It does cover a number of common UNIX commands, as well as a few somewhat less common commands, and briefly looks into some common utilities, such as sed and awk, which have historically been used heavily in shell scripting. While even further divergent things, such as AppleScript, the Tcl shell, or even graphical shells like the Mac OS X Finder, are technically shells, this book ignores them entirely, and hereafter uses the term shell to refer to the UNIX Bourne shell family.

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Linux Clustering: Building and Maintaining Linux Clusters

Linux Clustering: Building and Maintaining Linux Clusters provides Linux users with information about building their own Linux cluster from the ground up. It gives best practices, helpful hints, and guidelines about building one server or hundreds of servers at a level that administrators at any experience level can understand.

From installation of the air conditioning and power in the data center, to alternative file systems to the final production run, this book provides you with everything that you need to know. Linux Clustering: Building and Maintaining Linux Clusters walks you through the initial design and selection of the best possible types of clusters, as well as covering monitoring tools and providing for disaster recovery. Not only does this book provide information on parallel and Beowulf type clusters, Charles Bookman goes into depth on high availability clusters, load balancing, and provides advice for writing your own distributing applications as well. Incorporating best practices and cutting-edge approaches, Bookman provides step-by-step and tried-and-true methods of bringing up a Linux cluster to production level.

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Linux Cluster Architecture (Kaleidoscope)

Linux Cluster Architecture (Kaleidoscope)

Cluster computers provide a low-cost alternative to multiprocessor systems for many applications. Building a cluster computer is within the reach of any computer user with solid C programming skills and a knowledge of operating systems, hardware, and networking. This book leads you through the design and assembly of such a system, and shows you how to mearsure and tune its overall performance. A cluster computer is a multicomputer, a network of node computers running distributed software that makes them work together as a team. Distributed software turns a collection of networked computers into a distributed system. It presents the user with a single-system image and gives the system its personality. Software can turn a network of computers into a transaction processor, a supercomputer, or even a novel design of your own. Some of the techniques used in this book's distributed algorithms might be new to many readers, so several of the chapters are dedicated to such topics. You will learn about the hardware needed to network several PCs, the operating system files that need to be changed to support that network, and the multitasking and the interprocess communications skills needed to put the network to good use. Finally, there is a simple distributed transaction processing application in the book. Readers can experiment with it, customize it, or use it as a basis for something completely different.

About the Author

Alex Vrenios is the founder and principal analyst at the Distributed Systems Research Lab, a technical consulting group specializing in the performance measurement and analysis of distributed computing architectures. He holds a BS and MS in Computer Science, is the author of numerous articles, and is a member of both the ACM and the IEEE. He started his computing career more than 30 years ago, working with communications and data transmission software on mainframe computers. He made the transition to a networked C/UNIX environment, learned about interprocess communications distributed algorithms and cluster computing, and never looked back.

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Linux Assembly Language Programming

Linux Assembly Language Programming

Table of contents - Introduction; Placeholding Numeration; Logic Circuits and Computation; Assembly Language; Machine Language; Memory; The Stack; Linux User Programs; Interrupts; Bit Manipulations; Device Drivers; DOS Programs; Linux Boot Time Programs.

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Openvpn: Building And Integrating Virtual Private Networks

OpenVPN is an outstanding piece of software that was invented by James Yonan in the year 2001 and has steadily been improved since then. No other VPN solution offers a comparable mixture of enterprise-level security, usability, and feature richness. We have been working with OpenVPN for many years now, and it has always proven to be the best solution.

This book is intended to introduce OpenVPN Software to network specialists and VPN newbies alike. OpenVPN works where most other solutions fail and exists on almost any platform; thus it is an ideal solution for problematic setups and an easy approach for the inexperienced.

On the other hand, the complexity of classic VPN solutions, especially IPsec, gives the impression that VPN technology in general is difficult and a topic only for very experienced (network and security) specialists. OpenVPN proves that this can be different, and this book is aimed to document that.

I want to provide both a concise description of OpenVPN's features and an easy-to-understand introduction for the inexperienced. Though there may be many other possible ways to success in the scenarios described, the ones presented have been tested in many setups and have been selected for simplicity reasons.

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Running Xen: A Hands-On Guide to the Art of Virtualization

“This accessible and immediately useful book expertly provides the Xen community with everything it needs to know to download, build, deploy and manage Xen implementations.”

—Ian Pratt, Xen Project Leader VP Advanced Technology, Citrix Systems

The Real–World, 100% Practical Guide to Xen Virtualization in Production Environments

Using free, open source Xen virtualization software, you can save money, gain new flexibility, improve utilization, and simplify everything from disaster recovery to software testing. Running Xen brings together all the knowledge you need to create and manage high–performance Xen virtual machines in any environment. Drawing on the unparalleled experience of a world–class Xen team, it covers everything from installation to administration—sharing field-tested insights, best practices, and case studies you can find nowhere else.

The authors begin with a primer on virtualization: its concepts, uses, and advantages. Next, they tour Xen’s capabilities, explore the Xen LiveCD, introduce the Xen hypervisor, and walk you through configuring your own hard–disk–based Xen installation. After you’re running, they guide you through each leading method for creating “guests” and migrating existing systems to run as Xen guests. Then they offer comprehensive coverage of managing and securing Xen guests, devices, networks, and distributed resources. Whether you’re an administrator, data center manager, developer, system integrator, or ISP, Running Xen will help you achieve your goals with Xen–reliably, efficiently, with outstanding performance, and at a surprisingly low cost.

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Asterisk: The Future of Telephony

Many organizations are drawn to Internet telephony's promise of cost savings, and its ability to move data, images, and voice traffic over the same connection. Asterisk, an open source system than runs on Linux, offers the best option. This guide covers installing, configuring, and integrating Asterisk with existing phone systems, without the need for additional hardware.

It may be a while before Internet telephony with VoIP (Voice over Internet Protocol) reaches critical mass, but there's already tremendous movement in that direction. A lot of organizations are not only attracted to VoIP's promise of cost savings, but its ability to move data, images, and voice traffic over the same connection. Think of it: a single Internet phone call can take information sharing to a whole new level.
That's why many IT administrators and developers are actively looking to set up VoIP-based private telephone switching systems within the enterprise. The efficiency that network users can reach with it is almost mind-boggling. And cheap, if the system is built with open source software like Asterisk. There are commercial VoIP options out there, but many are expensive systems running old, complicated code on obsolete hardware. Asterisk runs on Linux and can interoperate with almost all standards-based telephony equipment. And you can program it to your liking.
Asterisk's flexibility comes at a price, however: it's not a simple system to learn, and the documentation is lacking. Asterisk: The Future of Telephony solves that problem by offering a complete roadmap for installing, configuring, and integrating Asterisk with existing phone systems. Our guide walks you through a basic dial plan step by step, and gives you enough working knowledge to set up a simple but complete system.
What you end up with is largely up to you. Asterisk embraces the concept of standards-compliance, but also gives you freedom to choose how to implement your system. Asterisk: The Future of Telephony outlines all the options, and shows you how to set up voicemail services, call conferencing, interactive voice response, call waiting, caller ID, and more. You'll also learn how Asterisk merges voice and data traffic seamlessly across disparate networks. And you won't need additional hardware. For interconnection with digital and analog telephone equipment, Asterisk supports a number of hardware devices.
Ready for the future of telephony? We'll help you hook it up.

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Linux Networking Cookbook

Linux Networking Cookbook
 

This soup-to-nuts collection of recipes covers everything you need to know to perform your job as a Linux network administrator, whether you're new to the job or have years of experience. With Linux Networking Cookbook, you'll dive straight into the gnarly hands-on work of building and maintaining a computer network. Running a network doesn't mean you have all the answers. Networking is a complex subject with reams of reference material that's difficult to keep straight, much less remember. If you want a book that lays out the steps for specific tasks, that clearly explains the commands and configurations, and does not tax your patience with endless ramblings and meanderings into theory and obscure RFCs, this is the book for you. You will find recipes for: Building a gateway, firewall, and wireless access point on a Linux network Building a VoIP server with Asterisk Secure remote administration with SSH Building secure VPNs with OpenVPN, and a Linux PPTP VPN server Single sign-on with Samba for mixed Linux/Windows LANs Centralized network directory with OpenLDAP Network monitoring with Nagios or MRTG Getting acquainted with IPv6 Setting up hands-free networks installations of new systems Linux system administration via serial console And a lot more. Each recipe includes a clear, hands-on solution with tested code, plus a discussion on why it works. When you need to solve a network problem without delay, and don't have the time or patience to comb through reference books or the Web for answers, Linux Networking Cookbook gives you exactly what you need.

About the Author

Carla Schroder is a self-taught Linux and Windows sysadmin, who discovered Red Hat 5.0 in 1997. She quickly found herself doing freelance consulting for small businesses and home users and integrating Linux and Windows on the LAN. She is the author of the "Linux Cookbook" (O'Reilly), and writes Linux how-tos for several computer publications including Enterprise Networking Planet and VoIP Planet.

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Professional LAMP : Linux, Apache, MySQL and PHP Web Development

• Paperback: 379 pages
• Publisher: Wrox (December 5, 2005)
• Language: English
• ISBN-10: 076459723X
• ISBN-13: 978-0764597237
• Product Dimensions: 9.1 x 7.3 x 1.2 inches

Advanced Linux Programming

Advanced Linux Programming

Autor: CodeSourcery LLC, Mark Mitchell, Alex Samuel, Jeffrey Oldham
Publicação: 11 / 06 / 2001
Editora: New Riders
ISBN: 0735710430
Páginas: 368 Idioma: Inglês

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