How do I delete all blank lines in a file? How do I remove all the

lines containing only space characters? To remove all blank lines, use the following command:

    :g/^$/d

To remove all lines with only whitespace (spaces or tabs) in them, use the following command:

    :g/^\s\+$/d

To remove all the lines with only whitespace, if anything, use the following command:

    :g/^\s*$/d

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