Find all files in the root directory and execute a sed command to replace all characters with their corresponding lowercase alphabetical characters, numbers, and special characters (~!@#$%^&*()).
find / -exec sed 'y/QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm0123456789./abcdefghijklmnopqrstuvwxyz0123456789~!@#$%^&*()/' {} \;