no dunstrc found -> skipping

Debian : 

$ mkdir ~/.config/dunst/ 

$ zcat /usr/share/doc/dunst/dunstrc.example.gz >> ~/.config/dunst/dunstrc

Arch :

$ cp /usr/share/dunstrc ~/.config/dunst/dunstrc

Reference :

dunst - a dmenu-ish notification daemon (Page 10) / Community Contributions / Arch Linux Forums