In this tutorial, we learn how to customize bash prompts with the PS1 variable. The PSI variable will say what something does. You can change this using the export command. Basically, you just type in the same thing and add in something. You can do this by simply typing it in using your keyboard. After this, press enter on your keyboard, then continue to change more things. There are a ton of different things you can do with this. You can find more from the website: http://pastebin.com/f2309fd10. Practice doing different prompts and save the website for future reference.