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Top Forums UNIX for Advanced & Expert Users Best way to search for patterns in huge text files Post 302385675 by andy2000 on Saturday 9th of January 2010 04:49:52 AM
Old 01-09-2010
scottn,

thank you for your Patience.

The first solution:

Code:
cat input_file1 input_file2 etc | grep -f pattern_file

returns virtual memory exhausted :-(

The second one:

Code:
awk 'NR == FNR { p[$1]; next } $0 ~ p[$2]' pattern_file input_file*

Does not work!! It returns all the lines of "input_file". A second bad thing is that, the searched pattern is NOT always at the second position, e.g.
Code:
...
000000 abc2344536      46575 0000
000000 89798798798    abc2344536
000000 abc2344555      46575 1234
000000 7777777777     abc2344536
...

:-(

Last edited by radoulov; 01-09-2010 at 11:50 AM.. Reason: Please use code tags!
 

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PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME
paps - UTF-8 to PostScript converter using Pango SYNOPSIS
paps [options] files... DESCRIPTION
paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves through the pango ft2 backend. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. --landscape Landscape output. Default is portrait. --columns=cl Number of columns output. Default is 1. --font=desc Set the font description. Default is Monospace 12. --rtl Do rtl layout. --paper ps Choose paper size. Known paper sizes are legal, letter, a4. Default is A4. --bottom-margin=bm Set bottom margin in postscript points (1/72 inch). Default is 36. --top-margin=tm Set top margin. Default is 36. --left-margin=lm Set left margin. Default is 36. --right-margin=rm Set right margin. Default is 36. --help Show summary of options. --header Draw page header for each page. --markup Interpret the text as pango markup. --encoding=ENCODING Assume the documentation encoding is ENCODING. --lpi Set the lines per inch. This determines the line spacing. --cpi Set the characters per inch. This is an alternative method of specifying the font size. --stretch-chars Indicates that characters should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops behaviour. AUTHOR
paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>. This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others). April 17, 2006 PAPS(1)
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