linux fontconfig

99-alias-prefer.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<alias binding="strong">
	<family>sans-serif</family>
	<prefer>
		<family>Roboto</family>
		<family>Source Han Sans SC</family>
	</prefer>
</alias>

<alias binding="strong">
	<family>serif</family>
	<prefer>
		<family>Droid Serif</family>
		<family>Source Han Sans SC</family>
	</prefer>
</alias>

<alias binding="strong">
	<family>monospace</family>
	<prefer>
		<family>Droid Sans Mono Slashed</family>
		<family>Source Han Sans SC</family>
	</prefer>
</alias>
</fontconfig>