This presentation was given to the DC919 chapter on October 8th, 2017. It includes a cheat sheet with a handy list of commands to generate DDoS attack traffic and a TCP spoofed full three way handshake DDoS tool that I developed.
WARNING be super careful using these in your lab environment. RST responsed from your device under test can leak to the Internet if you're not careful and you could end up DDoS-ing a real IP address.