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{{implementation|UNIX Shell}}[[wp:Rc|'''rc''']] is a simple yet powerful shell written by Tom Duff. Originally used on AT&T's Version 10 UNIX, it is now primarily used under [http://en.wikipedia.org/wiki/Plan_9_from_Bell_Labs Plan 9], where it is the default shell. Despite rc's simplicity, it is powerful enough that many of Plan 9's basic utilities are written using it.
==Examples==
Here is a script to check the weather in a given city. (Retrieved from [http://plan9.bell-labs.com/sources/plan9/rc/bin/weather http://plan9.bell-labs.com/sources/plan9/rc/bin/weather])
<lang rc>#!/bin/rc▼
▲#!/bin/rc
rfork e
DEFAULT=ewr
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sed 's/ *$//' |
uniq</lang>
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