Delete files securely

secure_delete.sh

#!/usr/bin/env bash

# securely overwrite data (default: 3 iterations of random data)
shred -v <path_to_your_file>

# only overwrite once with zeros
shred -vzn 0 <path_to_your_file>


# alternative, for also securely deleting directories
# the file is also removed
wipe <filename>
wipe -r <dirname>