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From: Charles Swiger <ch...@pkix.net>
Newsgroups: gnu.utils.bug
Subject: Re: Is it possible to return the line available in FILE1 but not
	FILE2 in diff?
Date: Mon, 12 Nov 2012 16:40:01 -0800
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Hi--

On Nov 12, 2012, at 3:19 PM, Peng Yu wrote:
> I just want to return the line available in FILE1 but not FILE2 in
> diff. After I read the document, it seems that this is not possible.
> Could anybody confirm whether this is true? If so, is there an
> alternative tool that does this? Thanks!

Using diff will show removed lines with a "-"; otherwise, consider
using the comm utility since that might be closer to what you want...

% cat > FILE1
This=20
is  =20
a=20
test
file.
% tail -4 FILE1 >! FILE2                                                 =
                                                                         =
     % diff -bdu FILE1 FILE2
--- FILE1	2012-11-12 16:37:45.000000000 -0800
+++ FILE2	2012-11-12 16:38:11.000000000 -0800
@@ -1,4 +1,3 @@
-This
 is
 a
 test

% comm FILE1 FILE2
This
		is
		a
		test
		file.

Regards,
--=20
-Chuck