Added password generator shell file to exercises folder (#588)

topics/shell/advanced/excercise/answers/02_password_generator.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Function to generate random password
+generate_password() {
+    # Define the characters to use for generating password
+    characters="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-_+="
+
+    # Initialize variable to store generated password
+    password=""
+
+    # Generate random password
+    for i in {1..30}; do
+        # Get a random character from the list of characters
+        random_char=${characters:RANDOM % ${#characters}:1}
+        # Append the random character to the password
+        password="${password}${random_char}"
+    done
+
+    # Print the generated password
+    echo "$password"
+}
+
+# Call the function to generate password
+generate_password