unique

unique is a simple tool that outputs the unique lines of its input.

The input can come from stdin or from a file. See usage.

Installation

Use Homebrew

brew install ro-tex/tap/unique

or

brew tap ro-tex/tap
brew install unique

Build it yourself

You will need Go for this.

go install github.com/ro-tex/unique@latest

Grab a binary

If you prefer a binary, you can download a Linux or Mac one from https://github.com/ro-tex/unique/releases.

Usage

When no arguments are given, unique reads from the standard input. Running

echo " one\n one\n two\n one" | unique

will output

 one
 two

In order to read from a file, use the -f parameter:

unique -f file.dat

That is equivalent to

cat file.dat | unique