Sick Beard is a Personal Video Recorder for newsgroup users (with limited torrent support). It watches for new episodes of your favorite shows and when they are posted it downloads them, sorts and renames them, and optionally generates metadata for them. It currently supports NZBs.org, NZBMatrix, NZBs'R'Us, Newzbin, Womble's Index, NZB.su, TVTorrents and EZRSS and retrieves show information from theTVDB.com and TVRage.com.
Daemon won't start
Sickbeard's systemd script attaches the app to
If starting sickbeard fails and journalctl states:
Unable to write PID file: No such file or directory 
This will create the directory, based on
/usr/lib/tmpfiles.d/sickbeard.conf which the sickbeard package installs.
You can read more about this problem in this forum thread.