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Top Forums Shell Programming and Scripting Find duplicate values in specific column and delete all the duplicate values Post 302985870 by senhia83 on Wednesday 16th of November 2016 12:36:20 PM
Old 11-16-2016
Either of these patches might work, although there are smarter ways

Code:
awk '{a[$2$3]++; b[$2$3]=$0}END{for(as in a) if(a[as]==1) print b[as]}' infile | sort -k2,2n

awk '{a[$2$3]++; b[$2$3]=$0}END{for(as in a) if(a[as]==1) print b[as]}' infile | awk 'NR==FNR{a[$0];next}($0 in a)' - infile

---------- Post updated at 01:36 PM ---------- Previous update was at 01:09 PM ----------

A little smoother solution

Code:
awk 'NR==FNR{a[$3]++;next} (a[$3]==1)' infile infile

This User Gave Thanks to senhia83 For This Post:
 

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MAKE_SOCKDFC(8) 					      System Manager's Manual						   MAKE_SOCKDFC(8)

NAME
make_sockdfc - Generates frozen configuratyion file for SOCKS server SYNOPSIS
make_sockdfc [infile [outfile] ] DESCRIPTION
make_sockdfc reads in a plain-text configuration file for the SOCKS server and produces a frozen configuration file as the output. Both arguments are optional. The default for infile is /etc/sockd.conf; the default for outfile is /etc/sockd.fc. You may specify infile while omitting outfile, but you cannot specify outfile without also speficying infile. The contents of the frozen configuration file is essentially the memory image of the parsed input file. Using the frozen configuration file can reduce the start-up delay of the SOCKS server program since it no longer has to parse the file contents. When the SOCKS server starts, it always looks for the frozen configuration file /etc/sockd.fc first. If that file is not found, it then tries to use the plain-text configuration file /etc/sockd.conf. If you use frozen configuration, you must remember to run make_sockdfc every time after you modify the plain-text file or the SOCKS server will continue to use the frozen file of a previous configuration. To find out the contents of a frozen configuration file, use dump_sockdfc. FILES
/etc/sockd.fc, /etc/sockd.conf SEE ALSO
dump_sockdfc(8), sockd.conf(5), sockd.fc(5) AUTHOR
Ying-Da Lee, yingda@best.com or yingda@esd.sgi.com May 6, 1996 MAKE_SOCKDFC(8)
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