Polecenie shred
Wykonanie, użycie: Overwrite a file to make the contents unrecoverable, and delete the file afterward if requested
Opcje wykonania shred
w konsoli
Shred standard output.
Force permissions to allow writing to files.
Print help message and exit.
Overwrite files num times (default is 25).
Shred num bytes. num can be expressed with suffixes (e.g., K, M, or G).
Remove file after overwriting. shred does not remove the file unless this option is specified.
Verbose mode.
Print version information and exit.
Shred the exact file size
; do not round up to the next full block.
On the final pass, overwrite with zeros to hide the shredding.
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