Copyright (C) 2000-2012 |
Manpages SHREDSection: FSF (1)Updated: March 2002 Index Return to Main Contents NAMEshred - delete a file securely, first overwriting it to hide its contentsSYNOPSISshred [OPTIONS] FILE [...]DESCRIPTIONOverwrite the specified FILE(s) repeatedly, in order to make it harder for even very expensive hardware probing to recover the data.
Delete FILE(s) if --remove (-u) is specified. The default is not to remove the files because it is common to operate on device files like /dev/hda, and those files usually should not be removed. When operating on regular files, most people use the --remove option. CAUTION: Note that shred relies on a very important assumption: that the filesystem overwrites data in place. This is the traditional way to do things, but many modern filesystem designs do not satisfy this assumption. The following are examples of filesystems on which shred is not effective: * log-structured or journaled filesystems, such as those supplied with
* filesystems that write redundant data and carry on even if some writes
* filesystems that make snapshots, such as Network Appliance's NFS server * filesystems that cache in temporary locations, such as NFS
AUTHORWritten by Colin Plumb.REPORTING BUGSReport bugs to <bug-fileutils@gnu.org>.COPYRIGHTCopyright © 2001 Free Software Foundation, Inc.This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. SEE ALSOThe full documentation for shred is maintained as a Texinfo manual. If the info and shred programs are properly installed at your site, the command
should give you access to the complete manual.
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