Installing extra all fonts...

[TitanKing]

If you need to install extra True Type Fonts do this if you have more then one user on Ubuntu :

cd /usr/share/fonts/truetype
sudo mkdir myfonts
cd myfonts
sudo cp ~/*.ttf .
sudo chown root.root *.ttf
sudo mkfontdir
cd ..
fc-cache

Or if it is only you

Simply go to you home folder, press CNTR + H to show hidden folders
, create a .fonts folder if it does not exist.
, copy all .ttf in that folder, type fc-cache in the promt and whala !