Date: Tue, 16 Dec 2008 14:14:20 +0000 From: RW <rwmaillists@googlemail.com> To: freebsd-questions@freebsd.org Subject: Re: Any doc reference on /entropy file ? Message-ID: <20081216141420.343a54c5@gumby.homeunix.com> In-Reply-To: <4947A83A.6050101@dugas-family.org> References: <20081216094719.EDCEE1065675@hub.freebsd.org> <4947A83A.6050101@dugas-family.org>
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On Tue, 16 Dec 2008 14:08:10 +0100 Bernard Dugas <bernard@dugas-family.org> wrote: > Hi, > > When i look at / in a standard installation like : > FreeBSD XXX 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Sun Feb 24 19:59:52 > UTC 2008 root@logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC > i386 > > There is only 1 file, named entropy : > > -rw------- 1 root wheel 4096 Dec 11 17:36 entropy > > I can't find any reference to that file in FreeBSD doc. > It contains random numbers that are written-out at shutdown and used to seed /dev/random on the next boot. > > Do i have to keep it read/write ? Can i put it in /var instead of / > to be able to keep / read-only ? It has to be on the root-partition, if it's going to be used. You can set entropy_file=NO if you don't want it. There are additional entropy files under /var, and the system generates it's own entropy during the boot stage, which is good enough for normal cases.
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