~/.config/fontconfig/fonts.conf

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
	<dir>/usr/share/fonts</dir>
	<dir>/usr/local/share/fonts</dir>
	<dir prefix="xdg">fonts</dir>
	<dir>~/.fonts</dir>
	<match target="pattern">
		<test qual="any" name="family">
			<string>mono</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>DejaVu Sans Mono</string>
		</edit>
	</match>
	<match target="pattern">
		<test qual="any" name="family">
			<string>sans serif</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>DejaVu Sans Mono</string>
		</edit>
	</match>
	<match target="pattern">
		<test qual="any" name="family">
			<string>sans</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>DejaVu Sans Mono</string>
		</edit>
	</match>
	<match target="pattern">
		<test qual="any" name="family">
			<string>monospace</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>DejaVu Sans Mono</string>
		</edit>
	</match>
	<match target="pattern">
		<test qual="any" name="family">
			<string>sans-serif</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>DejaVu Sans Mono</string>
		</edit>
	</match>
	<match target="font">
	<edit name="antialias" mode="assign">
	<bool>true</bool>
	</edit>
	<edit name="hinting" mode="assign">
	<bool>true</bool>
	</edit>
	<edit name="hintstyle" mode="assign">
	<const>hintslight</const>
	</edit>
	<edit name="rgba" mode="assign">
	<const>rgb</const>
	</edit>
	<edit name="autohint" mode="assign">
	<bool>true</bool>
	</edit>
	<edit name="lcdfilter" mode="assign">
	<const>lcddefault</const>
	</edit>
	<edit name="dpi" mode="assign">
	<double>100</double>
	</edit>
	<edit mode="assign" name="embeddedbitmap">
	<bool>true</bool>
</edit>
</match>
</fontconfig>