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Wicked Cool Shell Scripts, 2nd Edition by Brandon Perry, Dave Taylor

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3CREATING UTILITIES

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One of the main purposes of creating shell scripts is to drop complex command line sequences into files, making them replicable and easy to tweak. It should be no surprise, then, that user commands are sprawled across this book. What is surprising? That we haven’t written a wrapper for every single command on our Linux, Solaris, and OS X systems.

Linux/Unix is the only major operating system where you can decide that you don’t like the default flags of a command and fix it forever with just a few keystrokes, or where you can emulate the behavior of your favorite utilities from other operating systems by using an alias or a ...

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