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uniq(1) [minix man page]

UNIQ(1) 						      General Commands Manual							   UNIQ(1)

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)

Check Out this Related Man Page

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

uniq -- report or filter out repeated lines in a file SYNOPSIS
uniq [-c | -d | -u] [-i] [-f num] [-s chars] [input_file [output_file]] DESCRIPTION
The uniq utility reads the specified input_file comparing adjacent lines, and writes a copy of each unique input line to the output_file. If input_file is a single dash ('-') or absent, the standard input is read. If output_file is absent, standard output is used for 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 Only output lines that are repeated in the input. -f num Ignore the first num fields in each input line when doing comparisons. A field is a string of non-blank characters separated from adjacent 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 num fields will be ignored. Character numbers are one based, i.e., the first character is character one. -u Only output lines that are not repeated in the input. -i Case insensitive comparison of lines. ENVIRONMENT
The LANG, LC_ALL, LC_COLLATE and LC_CTYPE environment variables affect the execution of uniq as described in environ(7). EXIT STATUS
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
The uniq utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. HISTORY
A uniq command appeared in Version 3 AT&T UNIX. BSD
December 17, 2009 BSD
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