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- Newsgroups: comp.mail.misc
- Path: sparky!uunet!caen!sol.ctr.columbia.edu!eff!ckd
- From: ckd@eff.org (Christopher Davis)
- Subject: Re: help on IP address
- In-Reply-To: ralphs@halcyon.com's message of 5 Nov 92 15:33:49 GMT
- Message-ID: <CKD.92Nov7170142@loiosh.eff.org>
- Sender: usenet@eff.org (NNTP News Poster)
- Nntp-Posting-Host: loiosh.eff.org
- Organization: Electronic Frontier Foundation Tech Central
- References: <Bx5Gn9.M9F.2@cs.cmu.edu> <1daes1INNqse@uniwa.uwa.edu.au>
- <1992Nov5.153349.13260@nwnexus.WA.COM>
- Date: Sat, 7 Nov 1992 22:01:44 GMT
- Lines: 52
-
- Ralph> == Ralph Sims <ralphs@halcyon.com>
-
- Ralph> Dig has proven especially useful, and is used by the folks at
- Ralph> the NIC more than nslookup, it seems.
-
- I don't know about the NIC, but I use dig in preference to nslookup.
-
- Ralph> And then there's a 'simple' (for somebody) trick that you can
- Ralph> use in your login profiles:
- [wrapped for clarity]
- Ralph> alias ptr echo \!$ \| awk -F. \'\{printf \"set
- Ralph> q=PTR\\n%s.%s.%s.%s.in-addr.arpa\\n\",\$4,\$3,\$2,\$1\}\' \|
- Ralph> nslookup
-
- The dig equivalent to this is:
-
- alias ptr 'dig -x'
-
- dig is great. It's on venera.isi.edu, though I don't remember the exact
- directory, it should be pretty obvious.
-
- Other nice things about dig come from its nature as a command-line tool;
- you can use whatever shell command-line editing you're used to, unlike
- with nslookup.
-
- Example: to look up MX records, then HINFO, for a particular machine:
-
- nslookup:
- > set q=mx
- > foo.bar.dom.
- [results]
- > set q=hinfo
- > foo.bar.dom.
- [results]
-
- dig:
- % dig foo.bar.dom. mx
- [results]
- % ^mx^hinfo
- [results]
-
- And my favorite dig trick (thanks Randal):
- % dig . ns +aa @nearest.root.server > /var/domain/root.cache
-
- Since dig outputs its results in BIND file format (complete with
- comments, prefixed with ';') it's great for piping/appending stuff (say,
- doing a manual zone transfer to a file so you can prime your secondaries).
- --
- Christopher K. Davis | ``Usenet seems to run much like the Kif (or,
- <ckd@eff.org> EFF #14 | for the TV generation, Klingon) high command.
- System Administrator, EFF | Whoever takes action and can be heard wins.''
- +1 617 864 0665 [CKD1] | --Peter da Silva <peter@ferranti.com>
-