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Top Forums UNIX for Advanced & Expert Users How to compare two files using UNIX? Post 302464060 by gpsridhar on Tuesday 19th of October 2010 07:30:18 AM
Old 10-19-2010
How to compare two files using UNIX?

I have two files which have primary key(s) for each row.

I need to compare both the files and produce the output in the following format.

Code:
 
Primary key(s),file1 value,file2 value.

Both the input files will be comma separated files.

I have accomplished this using perl, but it is taking around two hours to generate the ouput for files with 50000 lines.

Can it be done using shell or awk in a much faster way?
 

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DIFFPDF(1)						      General Commands Manual							DIFFPDF(1)

NAME
diffpdf - compare two PDF files textually or visually SYNOPSIS
diffpdf [file1] [file2] DESCRIPTION
This manual page very briefly documents the diffpdf command. (Click the GUI's Help button or press F1 for more information.) DiffPDF is a GUI application used to compare two PDF files. By default the comparison is of the words on each pair of pages, but comparing character by character is also supported (e.g., for logo- graphic languages). And there's also support for comparing the pages by appearance (for example, if a diagram is changed or if a paragraph is reformatted, or a font changed). It is also possible to compare particular pages or page ranges. For example, if there are two versions of a PDF file, one with pages 1-12 and the other with pages 1-13 because of an extra page having been added as page 4, they can be compared by specifying two page ranges, 1-12 for the first and 1-3, 5-13 for the second. This will make DiffPDF compare pages in the pairs (1, 1), (2, 2), (3, 3), (4, 5), (5, 6), and so on, to (12, 13). If the program is passed two PDF filenames on the command line it will start up and compare those files in Text mode (or in Appearance mode if the filenames are preceded by -a or --appearance). SEE ALSO
For a command line tool for comparing PDF files see http://www.qtrac.eu/comparepdf.html. AUTHOR
diffpdf was written by Mark Summerfield <mark@qtrac.eu>. This manual page was written by Mark Summerfield <mark@qtrac.eu> and David Paleino <dapal@debian.org>, for the Debian project (and may be used by others). diffpdf v2.1.1 2012-06-04 DIFFPDF(1)
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