SHRED(1)                         User Commands                        SHRED(1)

NAME
       shred - overwrite a file to hide its contents, and optionally delete it

SYNOPSIS
       shred [OPTION]... FILE...

DESCRIPTION
       Overwrite  the specified FILE(s) repeatedly, in order to make it harder
       for even very expensive hardware probing to recover the data.

       If FILE is -, shred standard output.

       Mandatory arguments to long options are  mandatory  for  short  options
       too.

       -f, --force
              change permissions to allow writing if necessary

       -n, --iterations=N
              overwrite N times instead of the default (3)

       --random-source=FILE
              get random bytes from FILE

       -s, --size=N
              shred this many bytes (suffixes like K, M, G accepted)

       -u     deallocate and remove file after overwriting

       --remove[=HOW]
              like -u but give control on HOW to delete;  See below

       -v, --verbose
              show progress

       -x, --exact
              do not round file sizes up to the next full block;

              this is the default for non-regular files

       -z, --zero
              add a final overwrite with zeros to hide shredding

       --help display this help and exit

       --version
              output version information and exit

       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.  The optional
       HOW parameter indicates how to remove a directory  entry:  'unlink'  =>
       use  a  standard  unlink call.  'wipe' => also first obfuscate bytes in
       the name.  'wipesync' => also sync each obfuscated byte to the  device.
       The default mode is 'wipesync', but note it can be expensive.

       CAUTION:  shred  assumes the file system and hardware overwrite data in
       place.  Although this is  common,  many  platforms  operate  otherwise.
       Also,  backups and mirrors may contain unremovable copies that will let
       a shredded file be recovered later.  See the GNU coreutils  manual  for
       details.

AUTHOR
       Written by Colin Plumb.

REPORTING BUGS
       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright  (C) 2022 Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
       This is free software: you are free  to  change  and  redistribute  it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       Full documentation <https://www.gnu.org/software/coreutils/shred>
       or available locally via: info '(coreutils) shred invocation'

GNU coreutils 9.1               September 2022                        SHRED(1)

Czas wygenerowania: 0.00037 sek.

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