This directory of Linux commands is from Linux in a Nutshell, 5th Edition.
Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.
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shred
shred [options] files
Overwrite a file to make the contents unrecoverable, and delete the file afterward if requested.
Options
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.
