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Top Forums Shell Programming and Scripting How to delete a duplicate line and original with sed. Post 302530713 by chino_1 on Tuesday 14th of June 2011 10:47:33 PM
Old 06-14-2011
How to delete a duplicate line and original with sed.

I am completely new to shell scripting but have been assigned the task of creating several batch files to manipulate data. My final task requires me to find lines that have duplicates present then delete not only the duplicate but the original as well. The script will be used in a windows environment so I am using GNU sed. Below is a sample of the data:
Code:
180222,1,7.3,1Z0E947E0353634,9.49,UPAC
180223,1,7.3,1Z0E947E0373254,9.49,UPAC
180224,1,7.3,1Z0E947E0371556,8.33,UPAC
180222,1,7.3,1Z0E947E0353634,9.49,UPAC

In this example the first and last lines are duplicates and I would like to delete them both. I have been searching for several days and have not been able to figure out how to achieve this Smilie. Unfortunately I am short on time and would greatly appreciate any help possible. Thanks.

Last edited by Franklin52; 06-20-2011 at 03:32 AM.. Reason: Please use code tags
 

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MSGUNIQ(1)								GNU								MSGUNIQ(1)

NAME
msguniq - unify duplicate translations in message catalog SYNOPSIS
msguniq [OPTION] [INPUTFILE] DESCRIPTION
Unifies duplicate translations in a translation catalog. Finds duplicate translations of the same message ID. Such duplicates are invalid input for other programs like msgfmt, msgmerge or msgcat. By default, duplicates are merged together. When using the --repeated option, only duplicates are output, and all other messages are discarded. Comments and extracted comments will be cumulated, except that if --use-first is specified, they will be taken from the first translation. File positions will be cumulated. When using the --unique option, duplicates are discarded. Mandatory arguments to long options are mandatory for short options too. Input file location: INPUTFILE input PO file -D, --directory=DIRECTORY add DIRECTORY to list for input files search If no input file is given or if it is -, standard input is read. Output file location: -o, --output-file=FILE write output to specified file The results are written to standard output if no output file is specified or if it is -. Message selection: -d, --repeated print only duplicates -u, --unique print only unique messages, discard duplicates Input file syntax: -P, --properties-input input file is in Java .properties syntax --stringtable-input input file is in NeXTstep/GNUstep .strings syntax Output details: -t, --to-code=NAME encoding for output --use-first use first available translation for each message, don't merge several translations -e, --no-escape do not use C escapes in output (default) -E, --escape use C escapes in output, no extended chars --force-po write PO file even if empty -i, --indent write the .po file using indented style --no-location do not write '#: filename:line' lines -n, --add-location generate '#: filename:line' lines (default) --strict write out strict Uniforum conforming .po file -p, --properties-output write out a Java .properties file --stringtable-output write out a NeXTstep/GNUstep .strings file -w, --width=NUMBER set output page width --no-wrap do not break long message lines, longer than the output page width, into several lines -s, --sort-output generate sorted output -F, --sort-by-file sort output by file location Informative output: -h, --help display this help and exit -V, --version output version information and exit AUTHOR
Written by Bruno Haible. REPORTING BUGS
Report bugs to <bug-gnu-gettext@gnu.org>. COPYRIGHT
Copyright (C) 2001-2005 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for msguniq is maintained as a Texinfo manual. If the info and msguniq programs are properly installed at your site, the command info msguniq should give you access to the complete manual. GNU gettext-tools 0.14.4 April 2005 MSGUNIQ(1)
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