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From: thor <thor@irk.ru>
Subject: Erase memory on shutdown
Message-ID: <acbb3213-e79e-dfde-038f-b1476925cd4a@irk.ru>
Date: Sun, 5 Aug 2018 22:24:16 +0800
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Hello!

Just one paranoid question: How to cause FreeBSD to zero all RAM during 
shutdown?

Thor