Re: Is it possible to return the line available in FILE1 but not FILE2 in diff?

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 
is   
a 
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,
-- 
-Chuck