From owner-freebsd-questions@freebsd.org  Sun Sep 17 17:40:31 2017
Return-Path: <owner-freebsd-questions@freebsd.org>
Delivered-To: freebsd-questions@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5DE53E2085D
 for <freebsd-questions@mailman.ysv.freebsd.org>;
 Sun, 17 Sep 2017 17:40:31 +0000 (UTC)
 (envelope-from freebsd@edvax.de)
Received: from mailrelay14.qsc.de (mailrelay14.qsc.de [212.99.163.154])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "*.antispameurope.com",
 Issuer "TeleSec ServerPass DE-2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id C285E665E0
 for <freebsd-questions@freebsd.org>; Sun, 17 Sep 2017 17:40:30 +0000 (UTC)
 (envelope-from freebsd@edvax.de)
Received: from mx01.qsc.de ([213.148.129.14]) by mailrelay14.qsc.de;
 Sun, 17 Sep 2017 19:40:21 +0200
Received: from r56.edvax.de (port-92-195-1-252.dynamic.qsc.de [92.195.1.252])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by mx01.qsc.de (Postfix) with ESMTPS id 119513CBF9;
 Sun, 17 Sep 2017 19:40:21 +0200 (CEST)
Received: from r56.edvax.de (localhost [127.0.0.1])
 by r56.edvax.de (8.14.5/8.14.5) with SMTP id v8HHeKgv002117;
 Sun, 17 Sep 2017 19:40:20 +0200 (CEST)
 (envelope-from freebsd@edvax.de)
Date: Sun, 17 Sep 2017 19:40:20 +0200
From: Polytropon <freebsd@edvax.de>
To: Manish Jain <bourne.identity@hotmail.com>
Cc: "Steve O'Hara-Smith" <steve@sohara.org>, "freebsd-questions@freebsd.org"
 <freebsd-questions@freebsd.org>
Subject: Re: case command
Message-Id: <20170917194020.8f6db248.freebsd@edvax.de>
In-Reply-To: <VI1PR02MB12002177D7F2E684D387C90AF6620@VI1PR02MB1200.eurprd02.prod.outlook.com>
References: <59BE89E1.3050209@gmail.com>
 <VI1PR02MB1200B54F7772D37F6BE020F4F6620@VI1PR02MB1200.eurprd02.prod.outlook.com>
 <20170917155649.e869897ddcc97c3c9d04929c@sohara.org>
 <VI1PR02MB12002177D7F2E684D387C90AF6620@VI1PR02MB1200.eurprd02.prod.outlook.com>
Reply-To: Polytropon <freebsd@edvax.de>
Organization: EDVAX
X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-cloud-security-sender: freebsd@edvax.de
X-cloud-security-recipient: freebsd-questions@freebsd.org
X-cloud-security-Virusscan: CLEAN
X-cloud-security-disclaimer: This E-Mail was scanned by E-Mailservice on
 mailrelay14.qsc.de with 5B35F763B27
X-cloud-security-connect: mx01.qsc.de[213.148.129.14], TLS=1, IP=213.148.129.14
X-cloud-security: scantime:.1304
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 17 Sep 2017 17:40:31 -0000

On Sun, 17 Sep 2017 15:01:32 +0000, Manish Jain wrote:
> 
> 
> On 09/17/17 20:26, Steve O'Hara-Smith wrote:
> > On Sun, 17 Sep 2017 14:50:00 +0000
> > Manish Jain <bourne.identity@hotmail.com> wrote:
> > 
> >>
> >>
> >> On 09/17/17 20:12, Ernie Luzar wrote:
> >>> Looking for a system command that a I can pip a file through to change
> >>> all uppercase content to lower case.
> >>>
> >>> Is there such a command line command?
> >>
> >> cat <file> | tr '[:upper:]' '[:lower:]'
> > 
> > 	That poor overworked cat :)
> > 
> > tr '[:upper:]' '[:lower:]' < <file>
> > 
> 
> Being the proud owner of a beautiful cat, I rather feel inclined to pay 
> tribute to the family every now and then  : - )

The typical "useless use of cat" often is just an illustration
of how to use a certain command within a pipe chain. In cases
where no piping is needed, redirection can be used easily.

	% cat food.txt | grep "catfood" > mister_kitty.txt

Or:

	% grep "catfood" < food.txt > mister_kitty.txt

I hope the cat will understand now. =^_^=



-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...