This is a tutorial that shows you how to crack WiFi passwords using terminal on Ubuntu. You will have to download a file that the website has a link to but it actually works if your computer has a WiFi connection. This could be helpful if you ever forget your WiFi password or if you need to borrow some WiFi from Neighbors.

https://www.learn2crack.com/2013/07/learn-to-hack-wifi-password-with-ubuntu.html