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The following options are available:
| |
Precede each output line with the count of the number of times the line occurred in the input, followed by a single space. | |
| |
Output a single copy of each line that is repeated in the input. | |
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Output all lines that are repeated (like
| |
none | Do not separate groups of lines (this is the default). |
prepend | Output an empty line before each group of lines. |
separate | Output an empty line after each group of lines. |
| Ignore the first num fields in each input line when doing comparisons. A field is a string of non-blank characters separated from adjacent fields by blanks. Field numbers are one based, i.e., the first field is field one. |
| Case insensitive comparison of lines. |
|
Ignore the first
chars
characters in each input line when doing comparisons.
If specified in conjunction with the
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| Only output lines that are not repeated in the input. |
Madrid Lisbon Madrid
The following command reports three different lines since identical elements are not adjacent:
$ uniq -u cities.txt Madrid Lisbon Madrid
Sort the file and count the number of identical lines:
$ sort cities.txt | uniq -c 1 Lisbon 2 Madrid
Assuming the following content for the file cities.txt:
madrid Madrid Lisbon
Show repeated lines ignoring case sensitiveness:
$ uniq -d -i cities.txt madrid
Same as above but showing the whole group of repeated lines:
$ uniq -D -i cities.txt madrid Madrid
Report the number of identical lines ignoring the first character of every line:
$ uniq -s 1 -c cities.txt 2 madrid 1 Lisbon
UNIQ (1) | June 7, 2020 |
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