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Full Discussion: Removing duplicates depending on file size
Top Forums Shell Programming and Scripting Removing duplicates depending on file size Post 302830111 by krishmaths on Monday 8th of July 2013 06:20:42 AM
Old 07-08-2013
I tried this awk code and it returned expected result.

Code:
sort -t"." -k1 yourfile | awk -F"." 'BEGIN{row=$0;T=$1;} {if ($1==T) {FS=" ";if($2>max){max=$2;row=$0;}FS=".";} else {print row;row=$0}; T=$1} END{print row}'

Input File:
Code:
OLUSDN.gf.gif-1.JPEG 5 kb
LKJFDA01.gf.gif-1.JPEG 3 kb
LKJFDA01.gf.gif-2.JPEG 1 kb
LKJFDA01.gif-3.JPEG 0 kb
JLKJAIN11.gf.gif-1.JPEG 3 kb
LKJFAD.gf.gif-1. 2 kb
LKJFAD.gf.gif-4. 5 kb
LKJFAD.gf.gif-5. 7 kb


Output obtained:
Code:
JLKJAIN11.gf.gif-1.JPEG 3 kb
LKJFAD.gf.gif-5. 7 kb
LKJFDA01.gf.gif-1.JPEG 3 kb
OLUSDN.gf.gif-1.JPEG 5 kb

To exclude header, you may add a condition
Code:
if (NR>1)

in the awk code.
Last edited by krishmaths; 07-08-2013 at 07:21 AM.. Reason: Comments for excluding header
 

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LEARN ABOUT XFREE86

ng_gif_demux

NG_GIF_DEMUX(4) 					   BSD Kernel Interfaces Manual 					   NG_GIF_DEMUX(4)

NAME

     ng_gif_demux -- demultiplexer for packets from ng_gif(4) nodes

SYNOPSIS

     #include <netgraph/ng_gif_demux.h>

DESCRIPTION

     The ng_gif_demux netgraph node type demultiplexes the output from ng_gif(4) nodes in the netgraph(4) networking subsystem.

     The gif hook is meant to be connected to the lower or orphans hook of an ng_gif(4) node.  The inet, inet6, atalk, ipx, atm, natm, and ns
     hooks output frames of the given type when they are received on the gif hook.  When a frame is received on one of these hooks, it is encapsu-
     lated and sent out the gif hook.

HOOKS

     This node type supports the following hooks:

     gif    Connection to the lower or orphans hook of an ng_gif(4) node.

     inet   Hook for input and output of IP frames.

     inet6  Hook for input and output of IPv6 frames.

     atalk  Hook for input and output of AppleTalk frames.

     ipx    Hook for input and output of IPX frames.

     atm    Hook for input and output of ATM frames.

     natm   Hook for input and output of NATM frames.

     ns     Hook for input and output of NS frames.

CONTROL MESSAGES

     This node type supports only the generic control messages.

SEE ALSO

     gif(4), netgraph(4), netintro(4), ng_gif(4), ifconfig(8), ngctl(8), nghook(8)

AUTHORS

     Brooks Davis <brooks@FreeBSD.org>

BSD
								September 18, 2001							       BSD
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