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Date: Tue, 01 Aug 2006 17:27:48 +0100
From: Alex Zbyslaw <xfb52@dial.pipex.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Gotta start somewhere ... how many of us are really out there?
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User Freebsd wrote:

> Actually, using ifconfig wouldn't work ... it would give unique, but 
> as soon as you add another IP (ie. alias), the ID would change ... 
> you'd need to do something like:
>
> ifconfig | grep ether | sha256 | md5
>
> since the 'ether' would never change ...

I think you'd want

ifconfig | grep ether | head -1 | sha256 | md5

otherwise you are reliant on *none* of the ethernet cards changing 
rather than just the first not changing.

Also s/never/rarely/.  I don't change my ethernet cards every day, but 
every once in a while it will happen.  But I would have said that was 
good enough.

--Alex