uniq

Report or omit repeated adjacent lines.

Last updated: 2026-07-05 Report error

Syntax

$uniq [OPTIONS] [FILE [OUTPUT]]

Examples

$uniq file.txt

Examples

$uniq -c file.txt

Typical use cases

Remove duplicates

uniq file.txt

Count duplicates

uniq -c file.txt

Note Input must be sorted for global deduplication. Often piped from sort.

Export