The available fonts depend on which X Window System server you use to display the application. The standard X utility, xlsfonts(1), displays the available fonts on a server. For example:
# xlsfonts --courier-bold-o-normal--0-0-0-0-m-0-iso8859-1 --courier-bold-r-normal--0-0-0-0-m-0-iso8859-1 --courier-medium-o-normal--0-0-0-0-m-0-iso8859-1 --courier-medium-r-normal--0-0-0-0-m-0-iso8859-1 --symbol-medium-r-normal--0-0-0-0-p-0--symbol -symbol-medium-r-normal--0-0-0-0-p-0-sun-fontspecific -adobe-courier-bold-i-normal--0-0-0-0-m-0-iso8859-1 ... utopia-bolditalic utopia-italic utopia-regular variable vshd vtbold vtsingle zapfchancery-mediumitalic zapfdingbats |
Another helpful utility for displaying available fonts is xfontsel(1). Refer to the man pages for these utilities for more information.