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Full Discussion: Removing duplicates based on key
Top Forums UNIX for Dummies Questions & Answers Removing duplicates based on key Post 302547283 by pandeesh on Monday 15th of August 2011 04:27:23 AM
Old 08-15-2011
Removing duplicates based on key
Hi,

I have the input file with the below data:
Code:
12345|12|34
12345|13|23
3456|12|90
15670|12|13
12345|10|14
3456|12|13

I need to remove the duplicates based on the first field only.
I need the output like:
Code:
12345|12|34
3456|12|90
15670|12|13

The first field needs to be unique .

How to achieve this?
i can't use sort -u since i need to remove duplicate based only on the first field.
Thanks
 

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LEARN ABOUT DEBIAN

mcsender

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

NAME

       mcsender - Multicast test tool to send multicast test packets

SYNOPSIS

       mcsender [-t<ttl>] [-i<interface>] ip:port

DESCRIPTION

       mcsender sends multicast packets to the specified IPv4 or IPv6 multicast address and port. The packets sent contain the string "this is the
       test message from mclab/mcsender
".

OPTIONS

       -t<ttl>
	      Set the TTL (or hop limit for IPv6) to the specified value.

       -i<interface>
	      Specify the interface to use for outgoing multicast datagrams.

EXAMPLES

       To send datagrams to IPv4 multicast address 239.1.1.1 and port 12345 with a TTL of 3:

       $ mcsender -t3 239.1.1.1:12345

       To send datagrams to IPv4 multicast address 239.1.1.1 and port 12345 with a TTL of 3 out of interface eth1:

       $ mcsender -ieth1 -t3 239.1.1.1:12345

       To send datagrams to IPv6 multicast address ff15::1 and port 12345 with a hop limit of 3:

       $ mcsender -t3 ff15::1:12345

       To send datagrams to IPv6 multicast address ff15::1 and port 12345 with a hop limit of 3 out of interface eth1:

       $ mcsender -ieth1 -t3 ff15::1:12345

AUTHOR

       mcsender was written by Carsten Schill <carsten@cschill.de>.

       Support for IPv6 was added by Todd Hayton <todd.hayton@gmail.com>.

       This manual page was written by Julien BLACHE <jblache@debian.org>, for the Debian project (but may be used by others).

								  August 08, 2011						       MCSENDER(8)
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