tldr/pages/common/uniq.md

# uniq

> Output the unique lines from the given input or file.

- Display each line once:

`uniq {{file}}`

- Display only unique lines:

`uniq -u {{file}}`

- Display only duplicate lines:

`uniq -d {{file}}`

- Display number of occurences of each line along with that line:

`uniq -c {{file}}`

- Display number of occurences of each line, sorted by the most frequent:

`uniq -c {{file}} | sort -nr`
uniq: add page 2016-01-12 10:08:52 -05:00			`# uniq`

w: split out of common and add -i to osx, uniq: additions, seq: add page 2015-12-29 08:00:40 -05:00			`> Output the unique lines from the given input or file.`
uniq: add page 2016-01-12 10:08:52 -05:00
			`- Display each line once:`

			`uniq {{file}}`

			`- Display only unique lines:`

			`uniq -u {{file}}`

			`- Display only duplicate lines:`

			`uniq -d {{file}}`

			`- Display number of occurences of each line along with that line:`

			`uniq -c {{file}}`
uniq: add sorting example (#945) This involves another command, but it's such a natural extension of uniq's `-c` functionality that I feel it's warranted to show here. We should probably add a sort to the -c example too, because uniq only deals with sequential line repetitions. 2016-07-10 10:26:13 +01:00
			`- Display number of occurences of each line, sorted by the most frequent:`

			`uniq -c {{file}} \| sort -nr`