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15.9. Terminal Help

An enormous number of programs have been written for Unix, with literally hundreds of them using Mac OS X. Funny thing is, you never see their icons, because they don't have icons; they're Unix programs, invisible until you type their names into Terminal and press Enter.

Each Unix command generally calls up a single one of these programs (or processes, as geeks would say) that opens, performs a task, and closes.


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