Ok so i've put a load of .ttf font files in my documents folder which i done via mass storage mode.

I've just ran xterm and put in the following command:
mv ~/MyDocs/calibri.ttf ~/.fonts/

This doesn't work

So i put in the following command...
cp -rf /home/user/MyDocs/calibri.ttf /home/user/.fonts/

Still doesn't work.

Is there something i'm missing?

Thanks,