password

password.sh

#!/usr/bin/env bash
# Create a randomly generated password

echo "\
  1. alpha
  2. alpha + digit
  3. alpha + digit + special
  4. alpha + digit + space
  5. alpha + digit + special + space
  6. alpha + digit + limited
"
read -rp 'Type: ' type

case "${type}" in
  1)
    class='[:alpha:]'
    ;;
  2)
    class='[:alnum:]'
    ;;
  3)
    class='[:graph:]'
    ;;
  4)
    class='[:alnum:] '
    ;;
  5)
    class='[:print:]'
    ;;
  6)
    class='[:alnum:].!@#$%^&*-'
    ;;
  *)
    exit 1
    ;;
esac
read -rp 'Number of characters: ' chars

LC_ALL=C tr -dc "${class}" < /dev/urandom | head -c"${chars}"
printf '\n'