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Remove blank lines from a file using grep

By Quinn McHenry

969

How can I remove blank lines from a file in UNIX?

grep -v "^$" filename > newfilename

The ^$ within the quotes is a regular expression: ^=beginning of line, $=end of line, with no characters between.

See additional helpful information in the comments below.

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Quinn was one of the original co-founders of Tech-Recipes. He is currently crafting iOS applications as a senior developer at Small Planet Digital in Brooklyn, New York.

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