password_strength.sh

#!/bin/bash

# Prompt the user to enter a password
read -sp "Enter your password: " password
echo

# Check for minimum length of 8 characters
if [[ ${#password} -lt 8 ]]; then
    echo "<Weak Password>: Password must be at least 8 characters long."
    exit 1
fi

# Check for at least one lowercase letter
if ! [[ $password =~ [a-z] ]]; then
    echo "<Weak Password>: Password must contain at least one lowercase letter."
    exit 1
fi

# Check for at least one uppercase letter
if ! [[ $password =~ [A-Z] ]]; then
    echo "<Weak Password>: Password must contain at least one uppercase letter."
    exit 1
fi

# Check for at least one digit
if ! [[ $password =~ [0-9] ]]; then
    echo "<Weak Password>: Password must contain at least one number."
    exit 1
fi

# If all checks pass
echo "Password is strong."