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uniq(1) [redhat man page]

UNIQ(1) 								FSF								   UNIQ(1)

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). Mandatory arguments to long options are mandatory for short options too. -c, --count prefix lines by the number of occurrences -d, --repeated only print duplicate lines -D, --all-repeated[=delimit-method] print all duplicate lines delimit-method={none(default),prepend,separate} Delimiting is done with blank 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 --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. AUTHOR
Written by Richard Stallman and David MacKenzie. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 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 PARTICU- LAR PURPOSE. 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. uniq (coreutils) 4.5.3 February 2003 UNIQ(1)

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UNIQ(1) 							   User Commands							   UNIQ(1)

NAME
uniq - report or omit repeated lines SYNOPSIS
uniq [OPTION]... [INPUT [OUTPUT]] DESCRIPTION
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. -c, --count prefix lines by the number of occurrences -d, --repeated only print duplicate lines, one for each group -D print all duplicate lines --all-repeated[=METHOD] like -D, but allow separating groups with an empty line; METHOD={none(default),prepend,separate} -f, --skip-fields=N avoid comparing the first N fields --group[=METHOD] show all items, separating groups with an empty line; METHOD={separate(default),prepend,append,both} -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 -z, --zero-terminated line delimiter is NUL, not newline -w, --check-chars=N compare no more than N characters in lines --help display this help and exit --version output version information and exit 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'. AUTHOR
Written by Richard M. Stallman and David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report uniq translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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. SEE ALSO
comm(1), join(1), sort(1) Full documentation at: <http://www.gnu.org/software/coreutils/uniq> or available locally via: info '(coreutils) uniq invocation' GNU coreutils 8.28 January 2018 UNIQ(1)
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