From owner-freebsd-chat Sat Jun 3 17:54:20 2000 Delivered-To: freebsd-chat@freebsd.org Received: from mail.ptd.net (mail1.ha-net.ptd.net [207.44.96.65]) by hub.freebsd.org (Postfix) with SMTP id 9E49137BEE2 for ; Sat, 3 Jun 2000 17:54:12 -0700 (PDT) (envelope-from tms2@mail.ptd.net) Received: (qmail 22630 invoked from network); 4 Jun 2000 00:54:09 -0000 Received: from du207.cli.ptd.net (HELO mail.ptd.net) (204.186.33.207) by mail.ptd.net with SMTP; 4 Jun 2000 00:54:09 -0000 Message-ID: <39398A1D.5BAC99F1@mail.ptd.net> Date: Sat, 03 Jun 2000 18:43:41 -0400 From: "Thomas M. Sommers" Organization: None X-Mailer: Mozilla 4.51 [en] (X11; I; FreeBSD 3.2-RELEASE i386) X-Accept-Language: en MIME-Version: 1.0 To: Rahul Siddharthan Cc: gh , chat@FreeBSD.ORG Subject: Re: Why encourage stupid people to use *BSD WAS:Re: IE References: <200006021842.LAA24897@usr09.primenet.com> <393855D9.F5F0E5F0@mail.ptd.net> <20000603095822.A13686@physics.iisc.ernet.in> <011b01bfcd75$3706e650$2969a0d0@leviathan> <20000603225029.A13363@physics.iisc.ernet.in> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Rahul Siddharthan wrote: > > man 2 undelete > > Basically, a delete/rm command doesn't physically erase data from the > disk, it only removes the file entry. The data may still be there if > you're lucky. I don't know what the issues are with ufs, however. > With an msdos filesystem it's pretty straightforward to get the data > back if that hard disk space hasn't been written over in the meantime. The problem is that the space your file used to occupy may now be filled with information that belongs to someone else (who used your space and then deleted his file). This doesn't matter in MS-DOS, because that OS has no concept of file ownership, but it is a significant security hole in Unix. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message