Like others Linux Distributions, EOS has a basic directory structure inside FHS structure (Filesystem Hierarchy Standard), besides the known structure, the used daemons are in a sub structure inside /opt/addons.

There are different directories sorted to each daemon, for example, postgresql inside /opt/addons/ there is a directory postgresql that has the directories etc, include, share and var, which are of solely use of postgresql, so all the daemons have a log directory and independent configurations, while general logs from the system (/var/log/messages, for example) stay in the same structure, as only daemons have segmented resources.