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Most senior students who supervised introductory computer science labs at Brock University back when I was there kicked their feet up on the front desk with a calculus book cracked open and growled when their homework was interrupted by a question. As anyone will tell you, I never fit the mold of the typical student. In my first lab, I put together a short booklet covering all the questions I had when I took my first lab in COSC 101; namely what was that funny prompt drawn in flickering green on the ailing terminals and how the heck can you use it to give yourself a cool nickname like VAX Dude in the DEC VMS process?I inadvertently left a pile of my booklets behind and the next day one of the other supervisors stomped up to me and angrily waved one in my face. Her class wanted to know why she hadn’t covered any of the material in the booklet. Doing an introductory lesson in shell usage in the first lab would have cut into her homework time, and I had better make sure it did not happen again. It didn’t, and my lab students gained about a three-week advantage over the others in view of the fact they didn’t have to learn the development environment piecemeal between assignments.Many books, and many teachers, try to separate computer languages from the environment in which they run.That’s like talking about cooking an egg without indicating whether the egg will be cooked in a microwave oven, fried in a frying pan, or boiled in a pot of water.The environment affects what you can do and how you can do it.This is also true with shells.So don’t let a disgruntled supervisor prevent you from getting your feet grounded in the fundamentals. Like my first-year lab booklet, this chapter provides background information on where the Bourne Again Shell came from and why it was developed. Shell programming has its own unique mindset and a quick review is never a waste of time.http://rapidshare.com/files/277185230/Sams.Linux.Shell.Scripting.rar

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