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From: "Troy Settle" <troy@psknet.com>
To: "Livens Wim" <WLivens@colt-telecom.be>,
	"'Dave Wilson'" <davew@sai.co.za>, <freebsd-isp@FreeBSD.ORG>
Subject: RE: Off topic - shell skills
Date: Mon, 18 Dec 2000 07:19:33 -0500
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Dave,

As a future timesaver (because you will have to do this again someday), you
might want to take the time now to eliminate all A records to mail, and set
the following:

mail  IN  CNAME  mail.ISP.net.
@  IN  MX  10  mail.ISP.net.

By doing this, you've dropped your editing needs to 1 line in 1 zone file.

G'luck,

-Troy



** -----Original Message-----
** From: owner-freebsd-isp@FreeBSD.ORG
** [mailto:owner-freebsd-isp@FreeBSD.ORG]On Behalf Of Livens Wim
** Sent: Monday, December 18, 2000 5:51 AM
** To: 'Dave Wilson'; freebsd-isp@FreeBSD.ORG
** Subject: RE: Off topic - shell skills
**
**
** > How do I write a shell script that will change:
** >
** > mail	IN	A  10.1.1.58
** >
** > to:
** >
** > mail 	IN	A  10.0.0.1
** >
** >
** > ?
** >
** > I need this script to parse through each zone, so when it
** > finds "10.1.1.58"
** > in a zone it will change the "10.1.1.58" to "10.0.0.1".
** > Please help if you can.
**
** Just to give you an awk-alternative: pipe your zonefiles through this:
**
** awk '/10.1.1.58/ {if ($1=="mail"&&$2=="IN"&&$3="A") print
** $1"\t"$2"\t"$3"\t10.0.0.1"; else print $0;} !/10.1.1.58/ {print}'
**
** It's probably far from optimal but it will not just change *any*
** occurance
** of that ip address, as in the sed example; only the A records for hosts
** named "mail".
**
** --
** Wim Livens
** Internet Engineer
** COLT Telecom
** Brussels
**
**
**
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