Oh, Ubuntu has weird rules that prevent you from using bitmapped fonts. There's some configuration file in /etc/fontsomethingorother that you need to delete. I

Oh, Ubuntu has weird rules that prevent you from using bitmapped fonts. There's some configuration file in /etc/fontsomethingorother that you need to delete. I forget the specifics. After that you should be able to drop the bdf files into ~/.local/share/fonts (preferred) or ~/.fonts, run fc-cache, and see it show up in applications.