Disabling Font Smoothing
To disable font smoothing altogether here are a few things you may want to know.
Linux
Edit the file ~/.fonts.conf and add the following content:
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<match target="font" >
<edit mode="assign" name="antialias">
<bool>false</bool>
</edit>
</match>
</fontconfig>