More often than not, the words "sendmail configuration" strike dread in the hearts of sendmail and system administrators—and not without reason. sendmail configuration languages are as complex as any other programming languages, but used much more infrequently—only when sendmail is installed or configured. The average system administrator doesn't get enough practice to truly master this inscrutable technology. Fortunately, there's help. The sendmail Cookbook provides step-by-step solutions for the administrator who needs to solve configuration problems fast. Say you need to configure sendmail to relay mail for your clients without creating an open relay that will be abused by spammers. A recipe in the Cookbook shows you how to do just that. No more wading through pages of dense documentation and tutorials and creating your own custom solution—just go directly to the recipe that addresses your specific problem. Each recipe in the sendmail Cookbook outlines a configuration problem, presents the configuration code that solves that problem, and then explains the code in detail. The discussion of the code is critical because it provides the insight you need to tweak the code for your own circumstances. The sendmail Cookbook begins with an overview of the configuration languages, offering a quick how-to for downloading and compiling the sendmail distribution. Next, you'll find a baseline configuration recipe upon which many of the subsequent configurations, or recipes, in the book are based. Recipes in the following chapters stand on their own and offer solutions for properly configuring important sendmail functions such as:Delivering and forwarding mailRelayingMasqueradingRouting mailControlling spamStrong authenticationSecuring the mail transportManaging the queueSecuring sendmailsendmail Cookbook is more than just a new approach to discussing sendmail configuration. The book also provides lots of new material that doesn't get much coverage elsewhere—STARTTLS and AUTH are given entire chapters, and LDAP is covered in recipes throughout the book. But most of all, this book is about saving time—something that most system administrators have in short supply. Pick up the sendmail Cookbook and say good-bye to sendmail dread.

Reliable, flexible, and configurable enough to solve the mail routing needs of any web site, sendmail has withstood the test of time, but has become no less daunting in its complexity. Even the most experienced system administrators have found it challenging to configure and difficult to understand. For help in unraveling its intricacies, sendmail administrators have turned unanimously to one reliable source—the bat book, or sendmail by Bryan Costales and the creator of sendmail, Eric Allman. Now in its third edition, this best-selling reference will help you master the most demanding version of sendmail yet. The new edition of sendmail has been completely revised to cover sendmail 8.12—a version with more features and fundamental changes than any previous version of the Unix-based email routing program. Because the latest version of sendmail differs so significantly from earlier versions, a massive rewrite of this best-selling reference was called for. The book begins by guiding you through the building and installation of sendmail and its companion programs, such as vacation and makemap. These additional programs are pivotal to sendmail's daily operation. Next, you'll cover the day-to-day administration of sendmail. This section includes two entirely new chapters, "Performance Tuning" to help you make mail delivery as efficient as possible, and "Handling Spam" to deal with sendmail's rich anti-spam features. The next section of the book tackles the sendmail configuration file and debugging. And finally, the book wraps up with five appendices that provide more detail about sendmail than you may ever need. Altogether, versions 8.10 through 8.12 include dozens of new features, options, and macros, and this greatly expanded edition thoroughly addresses each, and provides and advance look at sendmail version 8.13 (expected to be released in 2003). With sendmail, Third Edition in hand, you will be able to configure this challenging but necessary utility for whatever needs your system requires. This much anticipated revision is essential reading for sendmail administrators.

This is the type of book that will either solve a specific problem you have or will give you ideas on automating/simplifying something that you've lived with for far too long.

— Thomas Duff, Duffbert's Random Musings

This book is geared towards any Unix user who doesn't want to spend time creating or testing shell scripts. Instead, Shell Scripting Recipes dissects and explains over 150 much-needed and practical real-world examples, and then shows the reader how and when to appropriately use them.

Because most scripts found in this book are POSIX (Portable Operating System Interface)-compliant, they are supported by many of the major shell variants, including Bash, ksh and sh, among others. File conversion, system administration, and resource monitoring are just a few of the topics covered in this highly practical shell scripting reference.

Secure your computer network with SSH! With transparent, strong encryption, reliable public-key authentication, and a highly configurable client/server architecture, SSH (Secure Shell) is a popular, robust, TCP/IP-based solution to many network security and privacy concerns. It supports secure remote logins, secure file transfer between computers, and a unique "tunneling" capability that adds encryption to otherwise insecure network applications. Best of all, SSH is free, with feature-filled commercial versions available as well.

SSH: The Secure Shell: The Definitive Guide covers the Secure Shell in detail for both system administrators and end users. It demystifies the SSH man pages and includes thorough coverage of:

SSH1, SSH2, OpenSSH, and F-Secure SSH for Unix, plus Windows and Macintosh products: the basics, the internals, and complex applications.Configuring SSH servers and clients, both system-wide and per user, with recommended settings to maximize security.Advanced key management using agents, agent forwarding, and forced commands.Forwarding (tunneling) of TCP and X11 applications in depth, even in the presence of firewalls and network address translation (NAT).Undocumented behaviors of popular SSH implementations.Installing and maintaining SSH systems.

Whether you're communicating on a small LAN or across the Internet, SSH can ship your data from "here" to "there" efficiently and securely. So throw away those insecure .rhosts and hosts.equiv files, move up to SSH, and make your network a safe place to live and work.

If you haven't worked with T1 before, you could be in for an unpleasant surprise. If you have, you'll already know that T1, the current network standard for business and professional Internet access, is neither efficient, easy to use, nor particularly well-suited to data transmission. "T1: A Survival Guide," a practical, applied reference on T1 data transport, is a life raft for navigating the shoals of a 40-year-old technology originally designed for AT&T's voice network.

Throughout T1's long life, network administrators have mainly learned it by apprenticeship, stumbling on troubleshooting tidbits and filing them away until they were needed again. This book brings together in one reference the information you need to set up, test, and troubleshoot T1.

"T1: A Survival Guide "covers the following broad topics:

What components are needed to build a T1 line, and how those components interact to transmit data effectively

How to use standardized link layer protocols to adapt the T1 physical layer to work with data networks

How to troubleshoot problems and work with the telephone company, equipment manufacturers, and Internet service providers

In spite of its limitations, T1 is a proven, reliable technology that currently meets the need for medium-speed, high reliability Internet access by institutions of many sizes, and it's likely to be around for a while. "T1: A Survival Guide" will take the guesswork out of using T1 as a data transport.

This complete guide to setting up and running a TCP/IP network is essential for network administrators, and invaluable for users of home systems that access the Internet. The book starts with the fundamentals — what protocols do and how they work, how addresses and routing are used to move data through the network, how to set up your network connection — and then covers, in detail, everything you need to know to exchange information via the Internet.

Included are discussions on advanced routing protocols (RIPv2, OSPF, and BGP) and the gated software package that implements them, a tutorial on configuring important network services — including DNS, Apache, sendmail, Samba, PPP, and DHCP — as well as expanded chapters on troubleshooting and security. "TCP/IP Network Administration" is also a command and syntax reference for important packages such as gated, pppd, named, dhcpd, and sendmail.

With coverage that includes Linux, Solaris, BSD, and System V TCP/IP implementations, the third edition contains:

Overview of TCP/IP

Delivering the data

Network services

Getting startedM

Basic configuration

Configuring the interface

Configuring routing

Configuring DNS

Configuring network servers

Configuring sendmail

Configuring Apache

Network security

Troubleshooting

Appendices include "dip," "ppd," and "chat" reference, a "gated" reference, a "dhcpd" reference, and a "sendmail" reference

This new edition includes ways of configuring Samba to provide file and print sharing on networks that integrate Unix and Windows, and a new chapter is dedicated to the important task of configuring the Apache web server. Coverage of network securitynow includes details on OpenSSH, stunnel, gpg, iptables, and the access control mechanism in xinetd. Plus, the book offers updated information about DNS, including details on BIND 8 and BIND 9, the role of classless IP addressing and network prefixes, and the changing role of registrars.

Without a doubt, "TCP/IP Network Administration, 3rd Edition" is a must-have for all network administrators and anyone who deals with a network that transmits data over the Internet.

TextMate is a powerful tool for programmers, web designers, and anyone else who regularly needs to work with text files on Mac OS X. TextMate focuses on pragmatic automation, which means it will save you time time that's always in short supply. See how your lowly text editor can become a hard working member of your staff.

TextMate is a full-featured text editor available for Mac OS X that can greatly enhance your text manipulation skills. TextMate is actually a thin shell over a personalized team of robot ninjas ready to do your bidding. Let's face it, who doesn't want their very own team of robot ninjas?

With TextMate you can do your normal work, but signal the ever-watchful ninjas as you go. At your command, they will launch into action, slicing through text, building repetitive structures of data in the blink of an eye, and much more. They will even post to your blog, handle your IRC conversations, and read your email.

Inside this book you will learn how to teleport instantly to the exact line of the file you need to be on, edit the data with the briefest incantations of power, and banish the end result to the land of your choosing. It's magic, as you can plainly see.

Leave the days of dull work behind. Learn your spells, gain access to your team of robot ninjas, and you too will be able to edit text so effortlessly that everyone watching over your shoulder will be forced to ask, "Wait, how did you do that?"

Throughout its history, Understanding Telephone Electronics has been, by far, one of the most popular books on telecommunication electronics in the trade, electronic distribution, and educational markets because of its very simple, direct approach to the technology. In keeping with the distinguished tradition of its predecessors, Understanding Telephone Electronics, Fourth Edition covers conventional telephone fundamentals, including both analog and modern digital communication techniques, and provides basic information on the functions of each telephone system component, how electronic circuits generate dial tones, and how the latest digital transmission techniques work.

This new edition of Stephen Bigelow's well-known, widely used text on telephone electronics offers comprehensive coverage of the latest developments in fiber optic technology, the convergence of telecommunications, cable-TV and Internet services, and CTI (computer telephony integration). The authors have made extensive revisions in these and other essential areas, such as business systems, voice mail, phone networking, enhanced services, satellite communications, wireless paging systems, digital communications, and much more to ensure that topics covered are current with the most recent advances in technology. The original Understanding Telephone Electronics has been a "gold standard" reference and training staple for years. Likewise, Understanding Telephone Electronics, Fourth Edition will serve as an essential and invaluable resource for technicians, engineers, students at major universities and corporations, and anyone with an enthusiasm for telecommunication electronics.

Provides comprehensive coverage of telephone system functions and the role of the Internet in telephony

Updates encompass the trends and advances of the booming telecommunications field, with new chapters on fiber optic technology and the Internet

This major revision of the best-selling and single most comprehensive guide to UNIX system administration is ideal as both an introductory tutorial for those new to system administration AND a day-to-day reference for “power administrators.” Practical and hands-on in approach, it covers every aspect of system administration — from basic topics to UNIX esoterica — and provides explicit instructions for dealing with the six most popular versions of UNIX. Covers topics such as The Filesystem; Controlling Processes; Serial Devices; Periodic Processes; Backups; Syslog and Log Files; Configuring the Kernel; TCP/IP and Routing; The Domain Name System; The Network File System; Sharing System Files; SLIP and PPP; The Internet; Security; Printing and Imaging; Disk Space Management; Accounting; and UUCP. Includes CD ROM with source code, sample programs, and other tools and utilities helpful to UNIX SYSTEM ADMINISTRATION For system administrators and users of the UNIX operating system. ISBN of first edition: 0-13-933441-6.

In the last decade, the Internet has grown from a network that connected a few universities and research centers to a network that links many businesses and households all over the country. That expansion occurred for many reasons, but the technological advance that facilitated this growth was an obscure protocol called PPP. PPP isn't talked about as much as TCP and IP, but it plays a crucial role in extending networks into remote locations. The Point-to-Point Protocol enables telephone lines and other point-to-point connections to carry Internet traffic. It's the protocol that establishes and maintains the connection between your home and an Internet service provider. This book provides in-depth coverage of PPP for network administrators and others who are involved in the care and maintenance of PPP connections. It provides a thorough introduction to how PPP works, which will help you diagnose and troubleshoot problems. It discusses in detail how to set up dial-in and dial-out PPP on the most important platforms, including Windows, Linux, and Solaris. Whether you're a sophisticated user responsible for your own connection or a network administrator providing dial-up services for hundreds of remote users, you'll find this book an essential addition to your library. Covers:PPP implementations in Windows 95/98/NT, Solaris, and LinuxAuthentication (CHAP, PAP, Microsoft variants, and other techniques)Virtual networks and tunnels, including PPTPModems and serial linesRelated technologies, including DNS and ARPOptimizing and customizing a connectionDebugging techniques

Written by an in-the-trenches practitioner, this step-by-step guide shows you how to implement a successful Web analytics strategy. Web analytics expert Avinash Kaushik, in his thought-provoking style, debunks leading myths and leads you on a path to gaining actionable insights from your analytics efforts. Discover how to move beyond clickstream analysis, why qualitative data should be your focus, and more insights and techniques that will help you develop a customer-centric mindset without sacrificing your company’s bottom line.

Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

As Web sites and intranets become larger and more complex, static HTML files hit their limits. In the first part of Web Application Development with PHP the authors explain PHP's advanced syntax like classes, recursive functions and variables. They present software development methodologies and coding conventions which are a must-know for industry quality products as well as to help making develop faster and more productive. This part covers also many standard algorithms for tree-structures, string sorting and searching. Part Two focuses on the concept of Web Applications (as opposed to single scripts) and gives much insight into user and session management, e-commerce systems, XML applications and WDDX.

Individuals, organizations, and businesses are relying on their web pages to provide and collect information, manage processes, and interact with communities and customers. A reliable, informative, and responsive web site can reduce cost, increase visibility, and create a positive image for the owner of that site.

Behind every successful web page is an overworked and underappreciated webmaster.

Webmasters make sure that the information on a site is accessible and usable; that the site is always available; that performance is good; that users can get the information that they need; and that the site can collect the information it needs to serve those users. These disparate tasks require many different tools and skills. Webmaster in a Nutshell pulls together in a single volume all the essential reference information for webmasters working on UNIX-based web servers.

In this second edition of Webmaster in a Nutshell, we've updated our material to include the latest versions of HTML and Javascript, and also expanded the book to cover the newest technologies emerging on the Web. The book covers:

HTML 4.0, with special attention to forms, tables and framesCSS (Cascading Style Sheets)XML, the next-generation markup language for the WebCGI, with a chapter dedicated to the Perl module CGI.pmJavaScript 1.2PHP, the HTML-embedded programming languageHTTP 1.1, the underlying protocol that drives the WebApache server administration, including Apache modulesmod_perl, the Apache module for enhancing CGIperformance and providing a Perl interface to the Apache API

Webmaster in a Nutshell, part of the bestselling O'Reilly series of reference books, makes it easy to find the information you want about the technologies you use. You'll keep your other books on the shelf; you'll keep Webmaster in a Nutshell next to your keyboard.