Set preferred font in Linux (set system's default fonts)

fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
	
	<!-- for: ~/.config/fontconfig/fonts.conf -->

	<alias>
		<family>serif</family>
		<prefer><family>Noto Sans</family></prefer>
	</alias>
	<alias>
		<family>sans-serif</family>
		<prefer><family>Noto Sans</family></prefer>
	</alias>
	<alias>
		<family>sans</family>
		<prefer><family>Noto Sans</family></prefer>
	</alias>
	<alias>
		<family>monospace</family>
		<prefer><family>Hack</family></prefer>
	</alias>

</fontconfig>