Shred files in Linux including directory names

shred-all

#!/usr/bin/env bash

if [ "$#" -ne 1 ]; then
  echo "Usage: shred-all <dir>"
  exit 1
fi

dir=$1

if [ ! -d "$dir" ]; then
  echo "Must pass a directory"
  exit 1
fi

echo "Changing permissions"
chmod 777 -R "$dir"

echo "Deleting files"

find "$dir" -type f | {
  while read line; do
    shred "$line" -u
  done
}

echo "Deleting directories with randomized names"

find "$dir" -depth -mindepth 1 -type d | {
  while read line; do
    name=$RANDOM$RANDOM$RANDOM$RANDOM
    tmp="$dir/$name"
    mv "$line" "$tmp"
    rmdir "$tmp"
  done
}

rmdir "$dir"