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delete blank lines with sed

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Old 10-30-2005
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delete blank lines with sed

I have a text file with blank lines fullfilled with spaces and others only containing the "Enter" caracter, the \012.

I would like to eliminate all them with the sed command.

Is it possible?

making: sed '/^$/d' <file should delete the blank lines but doesn't work for the lines that only have \012.

Thanks in advance.
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Old 10-30-2005
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Try this:
sed '/^ *$/d'
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Old 08-21-2007
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This thread is ancient, but I wanted to say thanks to Perderabo. Your solution helped me out big time.
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