Getting a text file rid of all superfluous blank lines

To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx>
Subject: Getting a text file rid of all superfluous blank lines
From: Paul Smith <phhs80@xxxxxxxxx>
Date: Wed, 30 Nov 2005 11:00:33 +0000
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=dcSG+VqoSCrIEC027b8sCF1Ih78WPAtatkvkoF4Ev6qECNUDK4MrTZ/EYA89s6vrT9Rp6xu142h6WS0XDEtBmYW4ZyIDzt1SB7BCkPGR+okc/QVKUMpamePYZJKEh0reKUkrLwnv47uvsiZWicUDHEc3YD6tcHCrKALKWJ6qwvk=
List-help: <mailto:[email protected]?subject=help>
List-id: For users of Fedora Core releases <fedora-list.redhat.com>
List-post: <mailto:[email protected]>
List-subscribe: <https://www.redhat.com/mailman/listinfo/fedora-list>, <mailto:[email protected]?subject=subscribe>
List-unsubscribe: <https://www.redhat.com/mailman/listinfo/fedora-list>, <mailto:[email protected]?subject=unsubscribe>
Reply-to: For users of Fedora Core releases <fedora-list@xxxxxxxxxx>

Dear All

Taking a text file, how can one eliminate at once all superfluous blank lines?

Thanks in advance,

Paul

Follow-Ups:
- Re: Getting a text file rid of all superfluous blank lines
  - From: John Summerfied
- Re: Getting a text file rid of all superfluous blank lines
  - From: Amadeus W. M.
- Re: Getting a text file rid of all superfluous blank lines
  - From: Andy Green
- Re: Getting a text file rid of all superfluous blank lines
  - From: Tim
- Re: Getting a text file rid of all superfluous blank lines
  - From: Paul Howarth