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Top Forums UNIX for Dummies Questions & Answers Remove duplicates based on a column in fixed width file Post 302437447 by jim mcnamara on Thursday 15th of July 2010 06:37:30 AM
Old 07-15-2010
You want duplicates in a second file, singletons in another.
This creates two files: single.txt duplicate.txt
Code:
awk '{if (arr[substr($0,2,11)]++) {print $0>"duplicate.txt"} else{print $0>"single.txt" }} ' inputfile

 

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FOLD(1) 						    BSD General Commands Manual 						   FOLD(1)

NAME
fold -- fold long lines for finite width output device SYNOPSIS
fold [-bs] [-w width] [file ...] DESCRIPTION
fold is a filter which folds the contents of the specified files, or the standard input if no files are specified, breaking the lines to have a maximum of 80 characters. The options are as follows: -b Count width in bytes rather than column positions. -s Fold line after the last blank character within the first width column positions (or bytes). -w width Specifies width to use as a line width, instead of the default 80 characters. ENVIRONMENT
LC_CTYPE EXIT STATUS
The fold utility exits 0 on success, and >0 if an error occurs. SEE ALSO
expand(1), fmt(1) STANDARDS
The fold utility conforms to IEEE Std 1003.1-2008 (``POSIX.1''). BUGS
If underlining is present it may be messed up by folding. Width should be a multiple of 8 if tabs are present, or the tabs should be expanded using expand(1) before using fold. BSD
September 15, 2011 BSD
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