$ bcwipe
Copyright 2006 Jetico, Inc.
Usage: bcwipe [OPTIONS]... FILE...
Remove with wiping FILE(s).

  -V       output version information and exit
  -md      U.S. DoD seven pass extended character rotation wiping *
  -mg      (default) is 35 pass wiping by Peter Gutmann           **
  -mt      One pass test mode. First 4 bytes of every 512 bytes block
             will contain block number
  -mz      One pass zero wiping
  -m n     U.S. DoD n pass extended character rotation wiping     *
  -n sec   Wait sec seconds between wiping passes. (NAS mode)     ***
  -s       use system random instead of SHA-1
  -p       use random pattern instead of full random
  -v       explain what is being done
  -r       process the contents directories recursively
  -f       force wiping, never prompt        (use with caution)
  -d       do not delete file(s) after wiping
  -b       wipe contents of block devices    (use with caution)
  -S       wipe file slacks
  -F       wipe free space
  -i       prompt before any removal (y/[n]/a)
             y - yes, n - no(default), a - yes for all
  -I       disable interactive prompt
  -h       display this help and exit

*    - U.S. DoD 5200.28 (Department of Defence)
**   - Secure Deletion of Data from Magnetic and Solid-State Memory

http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html

***  - modern enterprise level storage systems (NAS, disk arrays etc.)
       employ powerful caches. To avoid undesirable caching effects
       use this option to insert delay before file deleting.

Report bugs to support@jetico.com