How to set the default monospace font on Xfce (Xubuntu)

While you can set your own font in your terminal or other tools, it will not change the default "Monospace" font that some applications use.

To change that, edit ~/.fonts.conf Show archive.org snapshot and add settings for the "monospace" family. Here is how it looks on my machine now:

<fontconfig>
  <match target="pattern">
    <test qual="any" name="family">
      <string>monospace</string>
    </test>
    <edit name="family" mode="assign">
      <string>DejaVu Sans Mono</string>
    </edit>
  </match>
</fontconfig>

Fill in "DejaVu Sans Mono" with your preferred font's name.