I keep seeing instructions that suggest I go to "System Settings". I have no idea how to do that.
System Settings if present by default as a shortcut in Ubuntu taskbar :
If you don't have this shortcut you can open it by doing :
Command line way :
Open a terminal (Ctrl+Alt+T) and type :
Graphical way :
Open Unity dash (click on the Ubuntu logo on the taskbar or use the key of your keyboard) and search for "System Settings" :