Help install Adobe® Flash® Player
 

Will someone please tell me how to install Adobe® Flash® Player using my terminal.

Google for "[your distro] flash player package"

You can't get more command line than this:

1. download the *.tar.gz from the Adobe website,
2. decompress the file (tar -xvf [filename]},
3. change directory to the decompressed archive, and then,
4. as root, copy the file libflashplayer.so to /usr/lib/mozilla/plugins (for Firefox) or the appropriate plugins directory (for other browsers).

That is the one method of installing flashplayer that has never failed me.

sudo apt-get install flashplugin-nonfree

Does this not work?

Isn't flashplayer listed in your package manager? Mint has it in it's repos. My guess would be Ubuntu has it as well.

Try this:
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo apt-get update
sudo apt-get install flashplugin-installer