1UNIQ(1)                          User Commands                         UNIQ(1)
2
3
4

NAME

6       uniq - report or omit repeated lines
7

SYNOPSIS

9       uniq [OPTION]... [INPUT [OUTPUT]]
10

DESCRIPTION

12       Filter  adjacent matching lines from INPUT (or standard input), writing
13       to OUTPUT (or standard output).
14
15       With no options, matching lines are merged to the first occurrence.
16
17       Mandatory arguments to long options are  mandatory  for  short  options
18       too.
19
20       -c, --count
21              prefix lines by the number of occurrences
22
23       -d, --repeated
24              only print duplicate lines, one for each group
25
26       -D     print all duplicate lines
27
28       --all-repeated[=METHOD]
29              like  -D,  but  allow  separating  groups  with  an  empty line;
30              METHOD={none(default),prepend,separate}
31
32       -f, --skip-fields=N
33              avoid comparing the first N fields
34
35       --group[=METHOD]
36              show  all  items,  separating  groups  with   an   empty   line;
37              METHOD={separate(default),prepend,append,both}
38
39       -i, --ignore-case
40              ignore differences in case when comparing
41
42       -s, --skip-chars=N
43              avoid comparing the first N characters
44
45       -u, --unique
46              only print unique lines
47
48       -z, --zero-terminated
49              line delimiter is NUL, not newline
50
51       -w, --check-chars=N
52              compare no more than N characters in lines
53
54       --help display this help and exit
55
56       --version
57              output version information and exit
58
59       A field is a run of blanks (usually spaces and/or TABs), then non-blank
60       characters.  Fields are skipped before chars.
61
62       Note: 'uniq' does not detect repeated lines unless they  are  adjacent.
63       You may want to sort the input first, or use 'sort -u' without 'uniq'.
64

AUTHOR

66       Written by Richard M. Stallman and David MacKenzie.
67

REPORTING BUGS

69       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
70       Report any translation bugs to <https://translationproject.org/team/>
71
73       Copyright  ©  2020  Free Software Foundation, Inc.  License GPLv3+: GNU
74       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
75       This is free software: you are free  to  change  and  redistribute  it.
76       There is NO WARRANTY, to the extent permitted by law.
77

SEE ALSO

79       comm(1), join(1), sort(1)
80
81       Full documentation <https://www.gnu.org/software/coreutils/uniq>
82       or available locally via: info '(coreutils) uniq invocation'
83
84
85
86GNU coreutils 8.32                 June 2021                           UNIQ(1)
Impressum