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Full Discussion: Extract unique combination of rows from text files
Top Forums UNIX for Dummies Questions & Answers Extract unique combination of rows from text files Post 302707975 by Unilearn on Sunday 30th of September 2012 05:05:07 PM
Old 09-30-2012
Extract unique combination of rows from text files
Hi Gurus,

I have 100 tab-delimited text files each with 21 columns. I want to extract only 2nd and 5th column from each text file. However, the values in both 2bd and 5th column contain duplicate values but the combination of these values in a row are not duplicate. I want to extract only those entries which are unique based on the first appearance of value in the 5th column.

Ex. file1.txt conatins
rup m45 23 67 334 56 88
ytp m65 45 52 334 67 23
asd m43 12 34 456 23 11
wer m56 34 23 334 45 56
ayd m42 12 34 456 27 17
tyu m78 12 45 678 23 56

The output should be
rup m45 23 67 334 56 88
asd m43 12 34 456 23 11
tyu m78 12 45 678 23 56

Could somebody show me a way to deal with this for 100 files in one go!
Thanks a lot indeed.
 

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LEARN ABOUT DEBIAN

rup

rup(1)								   User Commands							    rup(1)

NAME

       rup - show host status of remote machines (RPC version)

SYNOPSIS

       rup [-hlt]

       rup [host...]

DESCRIPTION

       rup gives a status similar to uptime for remote machines. It broadcasts on the local network, and displays the responses it receives.

       Normally,  the  listing	is in the order that responses are received, but this order can be changed by specifying one of the options listed
       below.

       When host arguments are given, rather than broadcasting rup will only query the list of specified hosts.

       A remote host will only respond if it is running the rstatd daemon, which is normally started up from inetd(1M).

       In the absence of a name service, such as LDAP or NIS, rup displays host names as numeric IP addresses.

OPTIONS

       -h	Sort the display alphabetically by host name.

       -l	Sort the display by load average.

       -t	Sort the display by up time.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWrcmdc 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ruptime(1), inetd(1M), attributes(5)

       Solaris 10 Installation Guide: Basic Installations

BUGS

       Broadcasting does not work through gateways.

SunOS 5.10							    7 Mar 2003								    rup(1)
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