uniq

uniq is a utility command on Unix, Plan 9, Inferno, and Unix-like operating systems which, when fed a text file or standard input, outputs the text with adjacent identical lines collapsed to one, unique line of text.

This article is about the command-line utility. For other uses, see Uniq (disambiguation).
uniq
Original author(s)Ken Thompson
(AT&T Bell Laboratories)
Developer(s)Various open-source and commercial developers
Initial releaseFebruary 1973 (1973-02)
Written inC
Operating systemUnix, Unix-like, Plan 9, Inferno, MSX-DOS, IBM i
PlatformCross-platform
TypeCommand
Licensecoreutils: GPLv3+
Plan 9: MIT License
Websiteman7.org/linux/man-pages/man1/uniq.1.html
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