HP-UX Reference (11i v1 00/12) - 1 User Commands N-Z (vol 2)
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1/neqn.1
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u
uniq(1) uniq(1)
NAME
uniq - report repeated lines in a file
SYNOPSIS
uniq [-udc [-f fields][-s chars ][input_file [output_file]]
DESCRIPTION
uniq reads the input text file input_file, comparing adjacent lines, and copies the result to output_file.If
input_file is not specified, the standard input and standard output are used. If input_file is specified, but
output_file is not, results are printed to standard output. input_file and output_file must not be the same
file.
Line-Comparison Options
uniq recognizes the following options when comparing adjacent lines:
-u Print only those lines that are not repeated in the original file.
-d Print one copy only of each repeated line in the input file.
-c Generate an output report in default style except that each line is preceded by a count of the
number of times it occurred. If this option is specified, the
-u and -d options are ignored if
either or both are also present.
If none of the options
u, d,or c are present, uniq prints the results of the union of the
-u and -d
options, producing a copy of the original input file with the second and succeeding copies of any repeated
lines removed. (Note that repeated lines must be adjacent in order to be found — see sort(1)).
Field-Skip Options
Two options are provided for skipping an initialportion of each line when making comparisons:
-f fields Ignore the first fields fields, together with any blanks before each. fields is a positive
decimal integer. A field is defined as a string of non-space, non-tab characters
separated by tabs and/or spaces from its neighbors.
-s chars Ignore the first chars characters. chars is a positive decimal integer. Each line in the
input is assumed to be terminated with a new line character for purposes of com-
parison. Fields are skipped before characters.
EXTERNAL INFLUENCES
Environment Variables
LC_COLLATE must be equal to the value it had when the input files were sorted.
LC_CTYPE determines the interpretation of text within files as single- and/or multi-byte characters, and
defines a space character when the -f or -s option is used.
LC_MESSAGES determines the language in which messages are displayed.
If LC_COLLATE , LC_CTYPE or LC_MESSAGES is not specified in the environment or is set to the
empty string, the value of LANG is used as a default for each unspecified or empty variable. If LANG is
not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of LANG. If any
internationalization variable contains an invalid setting,
uniq behaves as if all internationalization vari-
ables are set to "C". See environ(5).
International Code Set Support
Single- and multi-byte character code sets are supported.
RETURN VALUE
Exit values are:
0 Successful completion.
>0 Error condition occurred.
AUTHOR
uniq was developed by OSF and HP.
HP-UX Release 11i: December 2000 − 1 − Section 1−−967
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