> I have 554 words in the following file one word per line.
> Some words are repeated up to 3 times.
>
> words.list
>
> If I try "cat words.list | uniq -u"
> It dumps all repeated words, I need one copy of all words.
uniq removes duplicates only if they are adjacent:
"Note: 'uniq' does not detect repeated lines unless they
are adjacent. You may want to sort the input first, or
use 'sort -u' without 'uniq'. Also, comparisons honor
the rules specified by 'LC_COLLATE'"
so the file must be sorted first.
$ sort words.list|uniq
Frédéric
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