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17. Fun with Terminal > Nine Useful Unix Utilities

Nine Useful Unix Utilities

So far, you’ve read about only a handful of the hundreds of Unix programs that are built into Mac OS X and ready to run. Yes, ls and sudo are very useful tools, but they’re only the beginning. Here’s a rundown of some more cool (and very safe) programs that await your experimentation.

Tip

If you don’t return to the $ prompt after using one of these commands, type q or, in some cases, quit, and then hit Enter.

bc

Mac OS 9, Mac OS X, and Windows aren’t the only operating systems that come with a basic calculator accessory; Unix is well equipped in this regard, too.

When you type bc and hit Enter, you get a copyright notice and then...nothing. Just type the equation you want to solve, such as 2+2, or 95+97+456+2-65, or (2*3)+165-95*(2.5*2.5), and then press Enter. On the next line, bc instantly displays the result of your calculation.


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