Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

/usr/share/thumbnailers/

//usr/share/thumbnailers/gnome-font-viewer.thumbnailer

[Thumbnailer Entry] TryExec=gnome-thumbnail-font Exec=gnome-thumbnail-font --size %s %u %o MimeType=application/x-font-ttf;application/x-font-pcf;application/x-font-type1;application/x-font-otf;font/ttf;font/otf;