You've downloaded a file and don't know what to do next.

If you would like to use a specific file, you will need to make sure it is in the correct place.

This means you will have to move your file from the "Downloads" folder to "Linux Files" folder.

You may want to make more folders inside of the Linux Files folder, though it isn't mandatory (Unless you downloaded a .zip- package). In the Terminal app (automatically installed along with linux), you will need to set it so that it grabs it from your files. 

How you change where the Terminal gets your downloads from is typing:
cd /filename/