UNIQ("1") manual page

Table of Contents

## Name

uniq - remove duplicate lines from a sorted file

## Synopsis

uniq [OPTION]... [INPUT [OUTPUT]]

## Description

Discard all but one of successive identical lines from INPUT (or standard input), writing to OUTPUT (or standard output).

-c, --count
  prefix lines by the number of occurrences
-d, --repeated
  only print duplicate lines
-D, --all-repeated
  print all duplicate lines
-f, --skip-fields=N
  avoid comparing the first N fields
-i, --ignore-case
  ignore differences in case when comparing
-s, --skip-chars=N
  avoid comparing the first N characters
-u, --unique
  only print unique lines
-w, --check-chars=N
  compare no more than N characters in lines
-N
  same as -f N
+N
  same as -s N
--help
  display this help and exit
--version
  output version information and exit

A field is a run of whitespace, then non-whitespace characters. Fields are skipped before chars.

## Reporting Bugs

Report bugs to <bug-textutils@gnu.org>.

## See Also

The full documentation for uniq is maintained as a Texinfo manual. If the info and uniq programs are properly installed at your site, the command

info uniq

should give you access to the complete manual.

## Copyright

Copyright © 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Table of Contents

- Name
- Synopsis
- Description
- Reporting Bugs
- See Also
- Copyright