File 12-tt-monospace-rendering.conf of Package fonts-config
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<match target="font">
<test name="force_bw_monospace">
<bool>true</bool>
</test>
<test name="spacing" compare="more_eq">
<int>100</int>
</test>
<edit name="autohint" mode="assign">
<bool>false</bool>
</edit>
<edit name="antialias" mode="assign">
<bool>false</bool>
</edit>
<edit name="hintstyle" mode="assign">
<const>hintfull</const>
</edit>
<edit name="embeddedbitmap" mode="assign">
<bool>true</bool>
</edit>
</match>
</fontconfig>