fc-cache issues

[adriangith]

This is what I get when I try to do anything with cups:

/usr/share/fonts: failed to write cache /usr/share/fonts/ghostscript: failed to write cache /usr/share/fonts/ghostscript/fonts: failed to write cache /usr/share/fonts/truetype: failed to write cache /usr/share/fonts/truetype/liberation: failed to write cache /usr/share/fonts/ubuntu: failed to write cache /root/.local/share/fonts: failed to write cache /root/.fonts: failed to write cache root@OpenWrt:/usr/share/fontconfig/conf.avail# vi /etc/fonts/fonts.conf root@OpenWrt:/usr/share/fontconfig/conf.avail# fc-cache /usr/share/fonts: failed to write cache /usr/share/fonts/ghostscript: failed to write cache /usr/share/fonts/ghostscript/fonts: failed to write cache /usr/share/fonts/truetype: failed to write cache /usr/share/fonts/truetype/liberation: failed to write cache /usr/share/fonts/ubuntu: failed to write cache /root/.local/share/fonts: failed to write cache /root/.fonts: failed to write cache

No idea what it means.