Termium is an application that has plenty of open-source tools guides. It's easy to copy and use them on your terminal. You can use these tools if you are a penetration tester or even an ethical hacking enthusiast.

We provide the tutorials on behalf of those who will use them for good purposes only. Usage of these tools for attacking targets without prior mutual consent is illegal. It's the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program. Only use for educational purposes.