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I think this is the sed you want<br>
sed -e 's/\(\([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}\).*/\1/'<br>
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-------- Original Message --------<br>
Subject: Re: [clue-tech] Re: regex smarties - what am I doing wrong?<br>
From: David L. Willson <a class="moz-txt-link-rfc2396E" href="mailto:DLWillson@TheGeek.NU"><DLWillson@TheGeek.NU></a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:mhavlicek1@yahoo.com">mhavlicek1@yahoo.com</a>, CLUE tech <a class="moz-txt-link-rfc2396E" href="mailto:clue-tech@cluedenver.org"><clue-tech@cluedenver.org></a><br>
Date: Wednesday, September 03, 2008 3:10:22 PM<br>
<blockquote cite="mid:20080903205946.M38799@TheGeek.NU" type="cite">
<pre wrap="">$ grep newwave hosts | sed -e 's/(([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3})/\1/p'
sed: -e expression #1, char 48: invalid reference \1 on `s' command's RHS
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Mike: Does escaping the open and closed parenths help?
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Surprise to me, yes, it does. I don't get the error any more. But I also don't get
just the IP address, I get the whole line... <mumble>
What I'm trying to do is to grep a trashy list of names, nicknames, aliases, and IP
addresses for (something), and in the case of a unique hit, return the IP address only,
and an error of either "not found" or "not found uniquely" in the appropriate other cases.
The first step, where I currently am stuck, is how to return only the IP address, rather
than the whole line. The rest should be a doddle. (remember Lemmings?)
I'll keep trying and let you know if I figure it out.
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