Ubuntu: Easy Installation of the Drop-down Terminal

Tilda is a very convenient drop-down terminal. A lot of people who play CS know that pressing the "~" key can open the terminal. Tilda is similar to that; by default, it's set to the F1 key. Just press F1, and a terminal will drop down from the top-left corner of your desktop. We can easily input some commands in it and then hide it again when we're done—it's super convenient!