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How do I write a sed command to delete a row if it doesn't contain certain words?

Posted on 2013-05-18
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Last Modified: 2013-05-18
Hi
How do I write a sed command to delete a row if it doesn't contain certain words?

ie.
If the line doesn't contain "Houston", "Dallas", or "Austin", I wan to delete the line

Thanks
Jamie
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Question by:jamie_lynn
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sed -ri '/(Houston|Dallas|Austin)/!d' file

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