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Full Discussion: regex question
Top Forums UNIX for Dummies Questions & Answers regex question Post 47481 by oombera on Wednesday 11th of February 2004 11:33:55 AM
Old 02-11-2004
Here's a nice little tutorial I found while looking around: The UNIX Bourne Shell

Also, a good Getting started with awk tutorial ... in case you're interested in learning more about regular expressions.

But anyway...

I'm having a hard time understanding exactly what you're trying to do.

You're grabbing IP addresses out of the WTMP file. I use ksh, but I think this will work for you:
Code:
#! /bin/bash

cat wtmp | strings | egrep "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]" | sort -u | while read LINE
do
  grep $LINE input.txt
done

If you only want to print the text part from input.txt, then use:
Code:
#! /bin/bash

cat wtmp | strings | egrep "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]" | sort -u | while read LINE
do
  grep $LINE input.txt | awk '{print $3}'
done

Last edited by oombera; 02-11-2004 at 02:55 PM..
 

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gappletviewer

GAPPLETVIEWER(1)                                                        GNU                                                       GAPPLETVIEWER(1)

NAME

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SYNOPSIS

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DESCRIPTION

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           gcjwebplugin uses the -plugin option to specify the named pipe the appletviewer should use for receiving commands (INPUT) and the one
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SEE ALSO

AUTHOR

0.98                                                                2010-07-05                                                    GAPPLETVIEWER(1)
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