uniq(1) [minix man page]

UNIQ(1) 						      General Commands Manual							   UNIQ(1)

NAME

       uniq - delete consecutive identical lines in a file

SYNOPSIS

       uniq [-cdu] [-n] [+n] [input [output]]

OPTIONS

       -c     Give count of identical lines in the input

       -d     Only duplicate lines are written to output

       -u     Only unique lines are written to output

       -n     Skip the first n columns when matching

       +n     Skip the first n fields when matching

EXAMPLES

       uniq +2 file	   # Ignore first 2 fields when comparing

       uniq -d inf outf    # Write duplicate lines to outf

DESCRIPTION

       Uniq  examines  a file for consecutive lines that are identical.  All but duplicate entries are deleted, and the file is written to output.
       The +n option skips the first n fields, where a field is defined as a run of characters separated by white space.  The -n option skips  the
       first n spaces.	Fields are skipped first.

SEE ALSO

       sort(1).

																	   UNIQ(1)

UNIQ(1) 						    BSD General Commands Manual 						   UNIQ(1)

NAME

     uniq -- report or filter out repeated lines in a file

SYNOPSIS

     uniq [-cdu] [-f fields] [-s chars] [input_file [output_file]]

DESCRIPTION

     The uniq utility reads the standard input comparing adjacent lines, and writes a copy of each unique input line to the standard output.  The
     second and succeeding copies of identical adjacent input lines are not written.  Repeated lines in the input will not be detected if they are
     not adjacent, so it may be necessary to sort the files first.

     The following options are available:

     -c      Precede each output line with the count of the number of times the line occurred in the input, followed by a single space.

     -d      Don't output lines that are not repeated in the input.

     -f fields
	     Ignore the first fields in each input line when doing comparisons.  A field is a string of non-blank characters separated from adja-
	     cent fields by blanks.  Field numbers are one based, i.e. the first field is field one.

     -s chars
	     Ignore the first chars characters in each input line when doing comparisons.  If specified in conjunction with the -f option, the
	     first chars characters after the first fields fields will be ignored.  Character numbers are one based, i.e. the first character is
	     character one.

     -u      Don't output lines that are repeated in the input.

     If additional arguments are specified on the command line, the first such argument is used as the name of an input file, the second is used
     as the name of an output file.

     The uniq utility exits 0 on success, and >0 if an error occurs.

COMPATIBILITY

     The historic +number and -number options have been deprecated but are still supported in this implementation.

SEE ALSO

     sort(1)

STANDARDS

     The uniq utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

BSD
								  January 6, 2007							       BSD