After you complete the upgrade, you'll want to check:
- config.php-dist to see if there have been any changes. I have a post which describes a utility that can assist.
- Schema changes. TTRSS will walk you through the procedure, if needed, when you first try to login after an upgrade.
- Rebuild the Sphinx full-text index of the ttrss database. You'll want to do this if there has been a schema change.
sudo systemctl stop searchd.service
Run the indexer to create the full-text index of the ttrss database:
sudo ./indexer --all
sudo systemctl start searchd.service
That's it. You're done.