shred

Overwrite files to securely delete data. More information: https://www.gnu.org/software/coreutils/shred.

• Overwrite a file:
  shred {{path/to/file}}
• Overwrite a file, leaving zeroes instead of random data:
  shred --zero {{path/to/file}}
• Overwrite a file 25 times:
  shred -n25 {{path/to/file}}
• Overwrite a file and remove it:
  shred --remove {{path/to/file}}