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Uniquniq is a Unix utility which, when fed a text file, outputs the file with adjacent identical lines collapsed to one. It is a kind of filter program. Typically it is used after sort. It can also output only the duplicate lines (with the -d option), or add the number of occurrences of each line (with the -c option).An example: To see the list of lines in a file, sorted by the number of times each occurs:
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Uniq".