TTF Forts for Ubuntu
The above methods didn't work for me. I'm using Ubuntu - this is how I did it:
Installation for all users
Fonts installed by this method will be accessible to all users of the system.
1. Copy fonts to be installed in /usr/share/fonts (create a subdirectory in the directory to store the .ttf files)
2. Type: fc-cache-fv
Installation for a single user
Fonts installed will be accessible by a single user. (This manipulation can be done without admin rights. Each user can have its own fonts.)
1. Copy fonts to be installed in ~/.Fonts
2. Type: fc-cache-fv