Hak 5 
Stingrays Outsmart Detection Apps, and an Update on MalwareTechBlog! - Threat Wire - Duration: 7 minutes, 38 seconds.
https://youtube.com/watch?v=3o1v5KZvrKA

Linux Terminal 201: How To Use Grep! - HakTip 158 - Duration: 8 minutes, 32 seconds.
https://youtube.com/watch?v=KhCn_NwxmSo