From e19a5aa428f9391bbd58879b27f083c1a835af5a Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Tue, 18 Dec 2007 11:20:31 +0100
Subject: Note that sorting uniq's input is often useful.

Suggested by Eric Blake.
---
 src/uniq.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src')

diff --git a/src/uniq.c b/src/uniq.c
index 286452249..5fcbed9a4 100644
--- a/src/uniq.c
+++ b/src/uniq.c
@@ -167,6 +167,13 @@ Mandatory arguments to long options are mandatory for short options too.\n\
 \n\
 A field is a run of whitespace, then non-whitespace characters.\n\
 Fields are skipped before chars.\n\
+"), stdout);
+     fputs (_("\
+\n\
+Note: while uniq can be useful even with unsorted input, in most applications\n\
+the input is sorted in a manner consistent with field-selection options.\n\
+E.g., use `sort' if `uniq' uses no such option (or simply use `sort -u');\n\
+use `sort -k 3b' with uniq -f2.\n\
 "), stdout);
       emit_bug_reporting_address ();
     }
-- 
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