From owner-freebsd-questions@FreeBSD.ORG Tue Aug 19 03:05:20 2008 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 330BB1065674 for ; Tue, 19 Aug 2008 03:05:20 +0000 (UTC) (envelope-from prvs=pauls=110ea086f@utdallas.edu) Received: from ip-relay-001.utdallas.edu (ip-relay-001.utdallas.edu [129.110.20.111]) by mx1.freebsd.org (Postfix) with ESMTP id 062C98FC18 for ; Tue, 19 Aug 2008 03:05:19 +0000 (UTC) (envelope-from prvs=pauls=110ea086f@utdallas.edu) X-Group: RELAYLIST X-IronPort-AV: E=Sophos;i="4.31,320,1215406800"; d="scan'208";a="6934255" Received: from smtp3.utdallas.edu ([129.110.20.110]) by ip-relay-001.utdallas.edu with ESMTP; 18 Aug 2008 22:05:18 -0500 Received: from [192.168.2.102] (cpe-24-175-90-48.tx.res.rr.com [24.175.90.48]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp3.utdallas.edu (Postfix) with ESMTPSA id A8D6123DE8 for ; Mon, 18 Aug 2008 22:05:18 -0500 (CDT) Date: Mon, 18 Aug 2008 22:05:18 -0500 From: Paul Schmehl To: FreeBSD Questions Message-ID: <8B61752D0585DE4B43DE2005@Macintosh.local> In-Reply-To: <20080819024404.GB4326@bacardi.frase.id.au> References: <20080819024404.GB4326@bacardi.frase.id.au> X-Mailer: Mulberry/4.0.8 (Mac OS X) MIME-Version: 1.0 Content-Type: multipart/signed; micalg=sha1; protocol="application/pkcs7-signature"; boundary="==========4486E46B0F7DAFE6CF41==========" X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Re: How to use dig with an ip list X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Aug 2008 03:05:20 -0000 --==========4486E46B0F7DAFE6CF41========== Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --On August 19, 2008 12:44:05 PM +1000 Fraser Tweedale = wrote: > On Mon, Aug 18, 2008 at 09:03:36PM -0500, Paul Schmehl wrote: >> I know I'm missing the obvious. I want to use an IP list to generate >> an ip+hostname list. IOW, I want to go from this: >> >> x.x.x.x >> y.y.y.y >> >> to this; >> >> x.x.x.x foo.domain.tld >> y.y..y.y bar.domain.tld >> >> What's the best/easiest way to do this? >> >> Paul Schmehl (pauls@utdallas.edu) >> Senior Information Security Analyst >> The University of Texas at Dallas >> http://www.utdallas.edu/ir/security/ > > dig(1) - see section `MULTIPLE QUERIES' > note the -x flag to instruct dig to perform a reverse lookup > > see also host(1) > That's not a great deal of help. I, of course, had read and re-read the=20 man pages before posting the question here, and I'm quite familiar with=20 the "normal" use of dig and host, because I use them daily in my work. The two options that man (1) dig provides are; on the commandline and in a = file. I can easily generate a list of hostnames having constructed an=20 iplist in a file and then preceding each line with "dig +short -x IP"=20 using vi. But that gives me a list of hostnames only. What I'm looking=20 for is the combination of the two. host (1), of course, doesn't even have=20 *those* options, so it's of no use for accomplishing what I'm attempting. Again, I want to start with a list of IPs and end up with a list of IPs=20 *plus* their hostnames (on the same line). I'm quite sure someone here=20 has the experience and/or knowledge to do this using shell commands. I=20 suspect awk might be helpful but haven't yet investigated that angle. Paul Schmehl (pauls@utdallas.edu) Senior Information Security Analyst The University of Texas at Dallas http://www.utdallas.edu/ir/security/ --==========4486E46B0F7DAFE6CF41==========--