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On Wed, 30 Jan 2002, Steve Marvell wrote:
On Wed, Jan 30, 2002 at 07:19:46PM +0000, Adrian Midgley wrote:A character in Cryptonomicon by Neal Stephenson (excellent book IMHO) erases some files by locating the area of disc where they were, and then overwriting that area with zeroes 6 times.What is an economical way to do that, please?I could get my "I write operating systems, shells and file systems" mate on it. He'd update the filesystem and kernel to allow for a new system call to react to an extra flag to rm which would perform this action.
Better to use a crypted file system and swap. also you wouldn't really over-write with zero's you use random/noise values, or at least alternating values. There are apps that do heavy duty FS level cleaning - a quick hunt in google or freshmeat should do the job. A. -- <A HREF = "http://termisoc.org/~betty";> Betty @ termisoc.org </A> "As a youngster Fred fought sea battles on the village pond using a complex system of signals he devised that was later adopted by the Royal Navy. " (this email has nothing to do with any organisation except me) -- The Mailing List for the Devon & Cornwall LUG Mail majordomo@xxxxxxxxxxxx with "unsubscribe list" in the message body to unsubscribe.