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Linux in a Nutshell, Fourth Edition by Aaron Weber, Stephen Figgins, Ellen Siever

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Name

shred

Synopsis

                  shred [options] files
               

Overwrite a file to make the contents unrecoverable, and delete the file afterwards if requested.

Options

-

Shred standard output.

-f, --force

Force permissions to allow writing to files.

--help

Print help message and exit.

-n num, --iterations= num

Overwrite files num times (default is 25).

-s num, --size= num

Shred num bytes. num can be expressed with suffixes (e.g., K, M, or G).

-u, --remove

Remove file after overwriting. shred does not remove the file unless this option is specified.

-v, --verbose

Verbose mode.

--version

Print version information and exit.

-x, --exact

Shred the exact file size; do not round up to the next full block.

-z, --zero

On the final pass, overwrite with zeros to hide the shredding.

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