fonts.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>

    <!-- ~/.config/fontconfig/fonts.conf -->

    <match target="pattern" >
        <test name="family" >
            <string>Monospace</string>
        </test>
        <edit mode="prepend" binding="strong" name="family" >
            <string>Hack</string>
        </edit>
        <edit mode="append" binding="strong" name="family" >
             <string>D2Coding</string>
        </edit>
     </match>

    <match target="pattern" >
        <test name="family" >
            <string>sans-serif</string>
        </test>
        <edit mode="prepend" binding="strong" name="family" >
            <string>Nimbus Sans L</string>
            <!--
            <string>Liberation Sans</string> -->
        </edit>
        <edit mode="append" binding="strong" name="family" >
             <string>D2Coding</string>
        </edit>
     </match>

    <match target="pattern" >
        <test name="family" >
            <string>serif</string>
        </test>
        <edit mode="prepend" binding="strong" name="family" >
            <string>Nimbus Roman No9 L</string>
            <!-- <string>Liberation Serif</string> -->
        </edit>
        <edit mode="append" binding="strong" name="family" >
             <string>NanumMyeongjo</string>
             <string>나눔명조</string>
        </edit>
     </match>


</fontconfig>