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-.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.35.
-.TH SHRED "1" "March 2007" "GNU coreutils 6.9" "User Commands"
-.SH NAME
-shred \- overwrite a file to hide its contents, and optionally delete it
-.SH SYNOPSIS
-.B shred
-[\fIOPTIONS\fR] \fIFILE \fR[...]
-.SH DESCRIPTION
-.\" Add any additional description here
-.PP
-Overwrite the specified FILE(s) repeatedly, in order to make it harder
-for even very expensive hardware probing to recover the data.
-.PP
-Mandatory arguments to long options are mandatory for short options too.
-.TP
-\fB\-f\fR, \fB\-\-force\fR
-change permissions to allow writing if necessary
-.TP
-\fB\-n\fR, \fB\-\-iterations\fR=\fIN\fR
-Overwrite N times instead of the default (25)
-.TP
-\fB\-\-random\-source\fR=\fIFILE\fR
-get random bytes from FILE (default /dev/urandom)
-.TP
-\fB\-s\fR, \fB\-\-size\fR=\fIN\fR
-shred this many bytes (suffixes like K, M, G accepted)
-.TP
-\fB\-u\fR, \fB\-\-remove\fR
-truncate and remove file after overwriting
-.TP
-\fB\-v\fR, \fB\-\-verbose\fR
-show progress
-.TP
-\fB\-x\fR, \fB\-\-exact\fR
-do not round file sizes up to the next full block;
-.IP
-this is the default for non\-regular files
-.TP
-\fB\-z\fR, \fB\-\-zero\fR
-add a final overwrite with zeros to hide shredding
-.TP
-\fB\-\-help\fR
-display this help and exit
-.TP
-\fB\-\-version\fR
-output version information and exit
-.PP
-If FILE is \-, shred standard output.
-.PP
-Delete FILE(s) if \fB\-\-remove\fR (\fB\-u\fR) 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 \fB\-\-remove\fR option.
-.PP
-CAUTION: Note that shred relies on a very important assumption:
-that the file system overwrites data in place. This is the traditional
-way to do things, but many modern file system designs do not satisfy this
-assumption. The following are examples of file systems on which shred is
-not effective, or is not guaranteed to be effective in all file system modes:
-.PP
-* log\-structured or journaled file systems, such as those supplied with
-AIX and Solaris (and JFS, ReiserFS, XFS, Ext3, etc.)
-.PP
-* file systems that write redundant data and carry on even if some writes
-fail, such as RAID\-based file systems
-.PP
-* file systems that make snapshots, such as Network Appliance's NFS server
-.PP
-* file systems that cache in temporary locations, such as NFS
-version 3 clients
-.PP
-* compressed file systems
-.PP
-In the case of ext3 file systems, the above disclaimer applies
-(and shred is thus of limited effectiveness) only in data=journal mode,
-which journals file data in addition to just metadata. In both the
-data=ordered (default) and data=writeback modes, shred works as usual.
-Ext3 journaling modes can be changed by adding the data=something option
-to the mount options for a particular file system in the /etc/fstab file,
-as documented in the mount man page (man mount).
-.PP
-In addition, file system backups and remote mirrors may contain copies
-of the file that cannot be removed, and that will allow a shredded file
-to be recovered later.
-.SH AUTHOR
-Written by Colin Plumb.
-.SH "REPORTING BUGS"
-Report bugs to <bug\-coreutils@gnu.org>.
-.SH COPYRIGHT
-Copyright \(co 2007 Free Software Foundation, Inc.
-.br
-This is free software. You may redistribute copies of it under the terms of
-the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
-There is NO WARRANTY, to the extent permitted by law.
-.SH "SEE ALSO"
-The full documentation for
-.B shred
-is maintained as a Texinfo manual. If the
-.B info
-and
-.B shred
-programs are properly installed at your site, the command
-.IP
-.B info shred
-.PP
-should give you access to the complete manual.