% password
# Generiert ein Passwort
<<random-generator> tr -cd '<allow-character-string>' | head -c<number-of-characters>
$ random-generator: printf '%s\n' "/dev/urandom" "/dev/random"
$ allow-character-string: printf '%s\n' '[:graph:]' 'A-Za-z0-9@#$%&_+=!?'