To install fonts manually
- create a subdirectory in /usr/share/fonts e.g. myttf
- copy your fonts to that directory
- start a terminal emulator and cd to the font directory you made
- switch to root by using "su" and do the following
If using Ubuntu without a proper root account, cd to the font directory you made and do "sudo mkfontdir && mkfontscale && fc-cache" instead of the last step above. When you logout and back in again, your new fonts will be ready for use.