Date: Tue, 16 Dec 2008 13:39:05 +0000 From: "Daniel Bye" <danielby@slightlystrange.org> To: freebsd-questions@freebsd.org Subject: Re: Any doc reference on /entropy file ? Message-ID: <20081216133905.GA5150@torus.slightlystrange.org> In-Reply-To: <4947A83A.6050101@dugas-family.org> References: <20081216094719.EDCEE1065675@hub.freebsd.org> <4947A83A.6050101@dugas-family.org>
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--SUOF0GtieIMvvwua Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Dec 16, 2008 at 02:08:10PM +0100, Bernard Dugas wrote: > Hi, >=20 > 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= =20 > 2008 root@logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >=20 > There is only 1 file, named entropy : >=20 > -rw------- 1 root wheel 4096 Dec 11 17:36 entropy >=20 > I can't find any reference to that file in FreeBSD doc. >=20 > Any reference to it ? What is it used for ? I have look in RANDOM area,= =20 > but no reference... >=20 > Do i have to keep it read/write ? Can i put it in /var instead of / to=20 > be able to keep / read-only ? It is used to safely seed the random number generator, I believe. A quick search through /etc/rc.d/* and /etc/defaults/rc.conf reveals that you can set $entropy_file in /etc/rc.conf to anything you like,=20 although a comment suggests # Set to NO to disable caching entropy through reboots. # /var/db/entropy-file is preferred if / is not avail. So yes, it seems you could move it off / if you want. Dan --=20 Daniel Bye _ ASCII ribbon campaign ( ) - against HTML, vCards and X - proprietary attachments in e-mail / \ --SUOF0GtieIMvvwua Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAklHr3kACgkQixf5fBYiFmpGQQCff1d5nkdwf7bJExKPpqssbVoH BZMAn1KKlhgtZUIjOV7s5hhde/lY0ieQ =9SsO -----END PGP SIGNATURE----- --SUOF0GtieIMvvwua--
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