From: "William Stanard" <wstanard@palmertrinity.org>
To: linux-newbie@vger.kernel.org
Subject: unusual uniq results
Date: Tue, 28 Sep 2004 11:09:12 -0400 [thread overview]
Message-ID: <fc.004c4e0000647133004c4e0000647133.647263@palmertrinity.org> (raw)
In doing a demo before a class (Linux Red-hat 2.4.18-14), I used the uniq
command on a file (dup_nums) that consisted of twelve lines, each line
containing a number, from one to 9. I repeated the numbers, 6, 8, and 9.
The std output showed the expected list of numbers, all duplicates
removed. At a student's suggestion, I ran uniq again, but this time
directed the output to the file itself....
uniq dup_num > dup_num
...and, lo and behold, the file dup_num was empty. I checked uniq --help,
info uniq, and man uniq, all to no avail. Shouldn't uniq have removed the
duplicate numbers and written one through 9 to the file?
Bill stanard
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next reply other threads:[~2004-09-28 15:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-28 15:09 William Stanard [this message]
2004-09-28 16:11 ` unusual uniq results Stone
2004-09-29 11:07 ` William Stanard
2004-09-29 12:44 ` Simon Valiquette
2004-09-29 14:53 ` Yapo Sebastien
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