---
name: "unique"
section: "1"
platform: "linux"
package: "john"
version: "1.6-17"
release: "Debian 3.0 (Woody)"
platforms: ["linux"]
url: "https://new.carta.tech/unique"
---

# unique(1)

removes duplicates from a wordlist

## NAME

unique - removes duplicates from a wordlist

## SYNOPSIS

**unique** *output-file*

## DESCRIPTION

This manual page documents briefly the **unique** command, which is part of the john package. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. **john**, better known as John the Ripper, is a tool to find weak passwords of users in a server.\
 wordlist (read from stdin), without changing the order. This is important to increase the performance of john when using the wordlist method.

## SEE ALSO

[**john**(1)](/john/1.md), [**mailer**(1)](/mailer/1.md), [**unafs**(1)](/unafs/1.md), [**unshadow**(1)](/unshadow/1.md), **john.ini**(5)

The programs are documented fully by John's documentation, which should be available in */usr/share/doc/john* or other location, depending on your system.

## AUTHOR

This manual page was written by Jordi Mallach \<jordi@debian.org\>, for the Debian GNU/Linux system (but may be used by others).\
 John the Ripper and mailer were written by Solar Designer \<solar@openwall.com\>. The complete list of contributors can be found in the CREDITS file in the documentation directory.