If you use the Linux console, the best way I found is:
in
/etc/default/console-setup
put, for example
CHARMAP="UTF-8"
CODESET="Lat7"
FONTFACE="Terminus"
FONTSIZE="28x14"
Another way is to use setfont from the kbd package:
setfont /usr/share/consolefonts/Lat7-Terminus28x14.psf
This works for my Debian; it may be different for you.
In Debian, you can also run&nbs......