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Top Forums UNIX for Dummies Questions & Answers Remove duplicates and keep them in a separate file Post 302859879 by CarloM on Friday 4th of October 2013 05:30:44 AM
Old 10-04-2013
Try
Code:
awk '(! a[$13]++) {print}' tomodify.txt > new.txt

If you want to remove even the first occurance of lines with duplicates:
Code:
awk '{counts[$13]++;lines[$13]=$0} END {for (i in counts) {if (counts[i]==1) {print lines[i]}}}' tomodify.txt > new.txt

EDIT: If you want to keep dupes as well, you could redirect the output inside awk instead:
Code:
awk '{counts[$13]++;lines[$13]=$0} END {for (i in counts) {if  (counts[i]==1) {print lines[i] >> "new.txt"} else {print lines[i] >> "dup.txt"}}}' tomodify.txt

 

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WC(1)								   User Commands							     WC(1)

NAME
wc - print newline, word, and byte counts for each file SYNOPSIS
wc [OPTION]... [FILE]... wc [OPTION]... --files0-from=F DESCRIPTION
Print newline, word, and byte counts for each FILE, and a total line if more than one FILE is specified. A word is a non-zero-length sequence of characters delimited by white space. With no FILE, or when FILE is -, read standard input. The options below may be used to select which counts are printed, always in the following order: newline, word, character, byte, maximum line length. -c, --bytes print the byte counts -m, --chars print the character counts -l, --lines print the newline counts --files0-from=F read input from the files specified by NUL-terminated names in file F; If F is - then read names from standard input -L, --max-line-length print the maximum display width -w, --words print the word counts --help display this help and exit --version output version information and exit AUTHOR
Written by Paul Rubin and David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report wc translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
Full documentation at: <http://www.gnu.org/software/coreutils/wc> or available locally via: info '(coreutils) wc invocation' GNU coreutils 8.28 January 2018 WC(1)
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