i3 on Debian, when I change to any pango font I get no text i3wm
With the tool fnt you can easily preview, and install fonts from Debian sid and Google Web Fonts (that's about 2,000 fonts that are DSFG compliant). Any user can use the tool to install fonts only for the user itself, or the system administrator can run it as root to install the fonts system wide.
How do fontsettings in gnome, kde and xfce work? Unix & Linux Stack Exchange
How to install and manage fonts on Linux Software requirements and conventions used The fontconfig library on Linux-based operating systems, fonts are managed via the fontconfig library. The directories where the fonts should be installed are declared in the /etc/fonts/font.conf configuration file: