Linux Directory Structure

/etc/ufw/                      # system-wide configuration (e.g. passwd, fstab, ssh, ufw) - et cetera
/opt/otterwiki/                # optional third-party software (Python-venv and otterwiki) - optional
/srv/otterwikidata/            # data served by system services (Wiki, Markdown, Git, Attachments) - service - independent from otterwiki
/var/lib/otterwiki             # variable application and system data (e.g. cache, tmp, database) - variable
/var/cache/otterwiki           # state of the application that can be deleted and newly generated
/var/log/otterwiki/            # system and application log files - log
/run/otterwiki/otterwiki.sock  # runtime data since boot (e.g. sockets, locks) - exist only until the next reboot - run
/usr                           # system-wide applications and data
/usr/bin                       # user commands and programs
/usr/sbin                      # system administration commands
/usr/local                     # locally installed software
/usr/local/bin                 # locally installed user programs
/usr/local/sbin                # locally installed admin programs