UNIQ(1) | User Commands | UNIQ(1) |
uniq - report or omit repeated lines
uniq [OPTION]... [INPUT [OUTPUT]]
Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or standard output).
With no options, matching lines are merged to the first occurrence.
Mandatory arguments to long options are mandatory for short options too.
A field is a run of blanks (usually spaces and/or TABs), then non-blank characters. Fields are skipped before chars.
Note: 'uniq' does not detect repeated lines unless they are adjacent. You may want to sort the input first, or use 'sort -u' without 'uniq'. Also, comparisons honor the rules specified by 'LC_COLLATE'.
Written by Richard M. Stallman and David MacKenzie.
GNU coreutils online help:
<https://www.gnu.org/software/coreutils/>
Report uniq translation bugs to
<https://translationproject.org/team/>
Copyright © 2018 Free Software Foundation, Inc. License
GPLv3+: GNU GPL version 3 or later
<https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO
WARRANTY, to the extent permitted by law.
Full documentation at:
<https://www.gnu.org/software/coreutils/uniq>
or available locally via: info '(coreutils) uniq invocation'
February 2019 | GNU coreutils 8.30 |