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>

Because most Linux systems comes with ugly font when `antialias' is disabled, you can download some Microsoft fonts such as Arial, Trebuchet, Verdana, Courrier New, .... On an ubuntu system, one only has to do the following:

sudo apt-get install msttcorefonts

If you really like Tahoma, you can install it by following the instructions located on the Ubuntu forums.