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Date: Tue, 16 Dec 2008 16:07:48 +0100 (CET)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Bernard Dugas <bernard@dugas-family.org>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Any doc reference on /entropy file ?
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>
> -rw-------   1 root  wheel  4096 Dec 11 17:36 entropy
>
> I can't find any reference to that file in FreeBSD doc.
>
> Any reference to it ? What is it used for ? I have look in RANDOM area, but 
> no reference...

at startup it seeds random generator, every 11 minutes and at shutdown 
it's saved from random generator.

it's here to make random generator more random - not starting clean at 
boot.