uniq
Remove non-unique lines
Usage: uniq options [list-of-files]
Standard Input: Used only if no list-of-files is given
Standard Output: Used to display results
SEE ALSO
 | For more information, see page 559 |
Useful options:
-d means show only duplicated lines.
-u means show only unique lines.
-c means show count for each line of number of duplicates.
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