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From: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net>
Message-Id: <201711291911.vATJBFtk019974@pdx.rh.CN85.dnsmgr.net>
Subject: Re: sort(1) sorting IP (v4) addresses (INET_ATON?)
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To: Craig Leres <leres@ee.lbl.gov>
Date: Wed, 29 Nov 2017 11:11:15 -0800 (PST)
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[ Charset UTF-8 unsupported, converting... ]
> On 11/29/17 10:35, Chris H wrote:
> > I'm constantly dealing with IPv4 addresses (millions). Sorting the mass
> > is never perfect, and I'm forced to *visually* fix those out of order.
> > Yet I continue to (later) find some I've missed -- I'm sick of it!
> > Thus far, I've found I attain the best results with sort(1):
> > 
> > sort -t . -k 4,4n -k 3,3n -k 2,2n? ./TCPLIST | sort -g>./SORTED
> > 
> > Which ends up pretty damn close. But not perfect.
> 
> % grep sortip ~/.cshrc
> a sortip "sort -t. +0 -1n +1 -2n +2 -3n +3 -4n"

Very nice, now I know why my attempt failed in the past,
I had the n on the + arg, not n the - arg.


-- 
Rod Grimes                                                 rgrimes@freebsd.org