Ecco però, se non ho frainteso:
Da “The TexLive Guide 2012”
3.4.4 System font configuration for XeTEX and LuaTEX
XeTEX and LuaTEX can use any font installed on the system, not just those in the TEX trees. They do these via related but not identical methods.
On Windows, fonts shipped with TEX Live are made available to XeTEX automatically. But if you have installed the xetex package on a Unix-compatible system, you need to configure your system to be able to find the fonts shipped with TEX Live via system name lookup, and not just filename lookup.
To facilitate this, when the xetex package is installed (either at initial installation or later), the necessary configuration file is created in TEXMFSYSVAR/fonts/conf/texlive-fontconfig.conf.
To set up the TEX Live fonts for system-wide use (assuming you have suitable privileges), proceed as follows:
Copy the texlive-fontconfig.conf file to /etc/fonts/conf.d/09-texlive.conf.
Run fc-cache -fsv.If you do not have sufficient privileges to carry out the steps above, or if you simply want to make the TEX Live fonts available to one user, you can do the following:
Copy the texlive-fontconfig.conf file to ~/.fonts.conf, where ~ is your home directory.
Run fc-cache -fv.You can run fc-list to see the names of the system fonts. The incantation fc-list : family style file spacing (all arguments are literal strings) shows generally interesting information.
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