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Date: 5 Aug 2018 11:02:40 -0400
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From: "John Levine" <johnl@iecc.com>
To: freebsd-questions@freebsd.org
Cc: thor@irk.ru
Subject: Re: Erase memory on shutdown
In-Reply-To: <acbb3213-e79e-dfde-038f-b1476925cd4a@irk.ru>
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In article <acbb3213-e79e-dfde-038f-b1476925cd4a@irk.ru> you write:
>Hello!
>
>Just one paranoid question: How to cause FreeBSD to zero all RAM during 
>shutdown?

On modern computers, turning the power off should do the trick.