Section (1) uniq
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.
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Note |
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_zsingle_quotesz_uniq_zsingle_quotesz_ does not detect repeated lines unless they
are adjacent. You may want to sort the input first,
or use _zsingle_quotesz_sort |
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/uniq>
or available locally via: info _zsingle_quotesz_(coreutils) uniq invocation_zsingle_quotesz_
COPYRIGHT |
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Copyright © 2019 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. |