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Developing a Linux command-line utility @ IBM developerWorks
Learn how to write Linux command-line utilities that are foolproof enough even for end users. Starting with an overview of solid command-line best practices and finishing with a comprehensive tour of a working page-selection tool, this article gives you the background you need to begin writing your own utilities.
This article illustrates how to write a Linux command-line utility, similar to standard commands such as cat, ls, pr, mv, and so on. I've chosen a utility called selpg, which stands for SELect PaGes. Selpg allows the user to specify a range of pages to be extracted from the input text, which could come from a file or another process. It is modeled on de facto conventions for creating commands in Linux
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