Unix is a Four Letter Word: Vi ---> Blank lines

Vi ---> Removing blank lines

Blank lines can be removed from a file with any of the following:


    :v/./d


    :g/^$/d


    :%!cat -s

If you want to get rid of duplicate blank lines, but leave the first blank line intact, try:


    :%!sed /./,/^$/!d

Be aware that you may need to get rid of trailing whitespace first. This can be accomplished with


    :%s/[ ^I]*$/

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