Removal and clean up - gdamjan/tt-rss-service GitHub Wiki

All of the state is in /var/lib/private/tt-rss/, all of the application is in a single file /var/lib/portables/tt-rss_*.raw. If you remove those, and the config file, the system is cleaned-up.

Step by step:

sudo systemctl stop tt-rss.socket tt-rss.service tt-rss-update.service 
sudo systemctl clean --what=state tt-rss
sudo portablectl detach tt-rss_v2021-03-03
sudo portablectl remove tt-rss_v2021-03-03
sudo rm /etc/tt-rss/config.env

Removing the nginx config is left for the reader.