From owner-freebsd-questions  Thu Sep 19 16: 6:15 2002
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From: "Drew Tomlinson" <drew@mykitchentable.net>
To: "FreeBSD Questions" <questions@freebsd.org>
Subject: Is It Possible To Sort My Text File?
Date: Thu, 19 Sep 2002 16:06:11 -0700
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I'm running Postfix and have it configured to send 450 errors if the
IP address of a mail server fails reverse lookup as described at
http://www.muine.org/~hoang/postfix.html.  As part of this config, I
have a "override" file that is checked first.  When I initially
created the file, I sorted my entries based upon reported domain
names.  I have now decided that I would prefer to have the entries
listed in IP address order.

Although I could fix the file manually, I know there are tools in the
OS that will do this for me and I'd like to learn how to use them.  I
am guessing that a command line using cat, sort, and sed or awk is
what I need but I haven't been able to figure this out.

Below is the first part of my file.  Please look at the last entry I
included because it has two IP addresses for the same domain comment
and I would really like to keep entries like this intact.  Any
suggestions and examples for building the command will be appreciated.

Thanks,

Drew

blacklamb# cat client_access
# Add unknown client addresses that we'll accept mail from.  See
document at
# http://www.muine.org/~hoang/postfix.html

# temp allows
209.112.63.30   OK

# 1st-N.com (Linksys Access Point)
209.185.202.19  OK

# lenny.501mail.net
203.27.248.40   550 No UCE!

# ABT Wish List -- wishlist.com (Electronics vendor) -- RCA HDTV
216.34.220.54   OK

# Margaret Andrews - jefco.com
204.253.68.19   OK

# alliance1.arschicago.com
207.224.40.14   550 No UCE!

# askme.com
63.251.171.71   OK

# bigfoot.com (Mark's Adding Machine)
206.97.247.12   OK

# bluemountain.com (greeting cards)
63.210.57.38    OK

# bodybuilding.com
63.146.198.70   OK

# Broadway Computer
216.205.93.45   OK
65.115.35.240   OK


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