Date: Mon, 18 Aug 2008 22:05:18 -0500 From: Paul Schmehl <pauls@utdallas.edu> To: FreeBSD Questions <questions@freebsd.org> Subject: Re: How to use dig with an ip list Message-ID: <8B61752D0585DE4B43DE2005@Macintosh.local> In-Reply-To: <20080819024404.GB4326@bacardi.frase.id.au> References: <F00086DB609A849EAB40A058@Macintosh.local> <20080819024404.GB4326@bacardi.frase.id.au>
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--==========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 <frase@frase.id.au> = 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==========--
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