@Shirish: I'm not sure if you are seeing the same problem as the original poster of this bug report, but I had the same problem you describe: The error `Fontconfig error: failed reading config file` appearing exactly 5 times. I could reproduce it by running `fc-cache`.
Through the links below, I found it was caused by Debian bugs #854166 and #866052, related to 5 packages: fonts-beng-extra, fonts-deva-extra, fonts-gujr-extra, fonts-guru-extra and fonts-orya-extra. (In my case, these fonts got installed as dependencies of tuxtype.) After manually reorganizing /etc/fonts/conf.avail/ to match the goal described in #866052, the error messages disappeared. HTH, Peter Sources: - https://unix.stackexchange.com/questions/454130/how-to-fix-fontconfig-error-failed-reading-config-file - https://bugs.freedesktop.org/show_bug.cgi?id=106497 - https://bugs.debian.org/854166 - https://bugs.debian.org/866052
