srm

Securely remove files or directories. Overwrites the existing data one or multiple times. Drop in replacement for rm. More information: http://srm.sourceforge.net/srm.html.

• Remove a file after a single-pass overwriting with random data:
  srm -s {{path/to/file}}
• Remove a file after seven passes of overwriting with random data:
  srm -m {{path/to/file}}
• Recursively remove a directory and its contents overwriting each file with a single-pass of random data:
  srm -r -s {{path/to/directory}}
• Prompt before every removal:
  srm -i {{\*}}