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Learning the Korn Shell: Unix Programming
 
 
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Learning the Korn Shell: Unix Programming [Paperback]

Arnold Robbins (Author), Bill Rosenblatt (Author)
3.6 out of 5 stars  See all reviews (5 customer reviews)
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Learning the Korn Shell: Unix Programming + Classic Shell Scripting: Hidden Commands that Unlock the Power of Unix + sed & awk (Nutshell Handbooks)
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Bill Rosenblatt
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Product Description

Lee R. Chikasue, Williamsburg Macromedia User Group, Feb 2003

This is an excellent book for anyone wanting to learn the Korn shell.

Product Description

The Korn shell is an interactive command and scripting language for accessing Unix® and other computer systems. As a complete and high-level programming language in itself, it's been a favorite since it was developed in the mid 1980s by David G. Korn at AT&T Bell Laboratories. Knowing how to use it is an essential skill for serious Unix users. Learning the Korn Shell shows you how to use the Korn shell as a user interface and as a programming environment.

Writing applications is often easier and quicker with Korn than with other high-level languages. Because of this, the Korn shell is the most often used shell in commercial environments and among inexperienced users. There are two other widely used shells, the Bourne shell and the C shell. The Korn shell, or ksh, has the best features of both, plus many new features of its own. ksh can do much to enhance productivity and the quality of a user's work, both in interacting with the system, and in programming. The new version, ksh93, has the functionality of other scripting languages such as awk, icon, Perl, rexx, and tcl.

Learning the Korn Shell is the key to gaining control of the Korn shell and becoming adept at using it as an interactive command and scripting language. Prior programming experience is not required in order to understand the chapters on basic shell programming. Readers will learn how to write many applications more easily and quickly than with other high-level languages. In addition, readers will also learn about Unix utilities and the way the Unix operating system works in general. The authors maintain that you shouldn't have to be an internals expert to use and program the shell effectively.

The second edition covers all the features of the current version of the Korn shell, including many new features not in earlier versions of ksh93, making it the most up-to-date reference available on the Korn shell. It compares the current version of the Korn shell to several other Bourne-compatible shells, including several Unix emulation environments for MS-DOS and Windows. In addition, it describes how to download and build ksh93 from source code.

A solid offering for many years, this newly revised title inherits a long tradition of trust among computer professionals who want to learn or refine an essential skill.

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Front Cover | Copyright | Table of Contents | Excerpt | Index | Back Cover
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Customer Reviews

Most Helpful Customer Reviews
8 of 8 people found the following review helpful
By A Customer
Format:Paperback
Although this book goes through an introduction to shell programming, and covers many features unique to the korn shell, there are large gaps in between. For example, its coverage of simple string and integer comparisons within "if" statements is not presented coherently.

It does not make a good general shell programming reference.

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13 of 14 people found the following review helpful
By A Customer
Format:Paperback
For some time, "Learning the Korn Shell" was the only source I had for k-shell programming. That was a bad idea. O'Reilly books are usually first-rate, but I guess they can't knock every pitch out of the park. I cannot recommend this book either as an introductory tutorial or as a reference. The first problem is that topics seem to be jumbled together, so that things are hard to find and to follow. Secondly, many subjects are either not covered at all, or are given the proverbial lick and a prayer. Even worse, the indexing is terrible. I find too many cases in which important things (like dot scripts, for instance) are simply not in the index, if they are covered at all in the text. Fortunately, there are alternatives to this book which I find much more satisfactory. By far the best is "The Korn Shell User and Programming Manual", by Anatole Olczak, an Addison-Wesley publication. It's pricey (about $50), but it's well-organized, complete, and very competently indexed.
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2 of 3 people found the following review helpful
Format:Paperback
I wanted a book that would enable me to pick up the essentials for the Korn Shell. I had installed Windows Services for Unix which did not have the bash shell I was used to. I bought this book with a little apprehension based on some of the less favourable reviews but proceeded anyway based on the very good experience I have had with O'Reilly books. I wasn't dissapointed. Although I found 'Learning the Bash shell' a slightly better laid out book. 'Learning the Korn shell' gave me what I wanted within half-an-hour of unpacking it. In particular the index allowed me to quickly look up specific topics I needed a handle on, like the vi codes to navigate the history from the command line. It is true that quite a bit of the material (like 'if constructs' for example) are common to both the Bash and the Korn shell but as a single desk reference for the Korn shell I would recommend this. I think the best way of using these books is to use them first off to learn the features and then keep them as a desk reference for those commands that are used now and again and need an aide memoir. I would recommend this book to someone who wanted to learn the Korn shell.
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