title: redis-server.service: Can't open PID file
body: <p>When running <code>sudo systemctl status redis</code>, I see this error message:</p>
  
  <pre><code>systemd[1]: redis-server.service: Can't open PID file /run/redis/redis-server.pid (yet?) after start: Operation not permitted
  </code></pre>
  
  <p>However, Redis seems to work fine. I can run redis-cli, do the traditional ping test, create a database, etc. The <code>/var/run/redis</code> folder is owned by redis, so is the <code>redis-server.service</code>. I did set <code>supervised</code> to <code>systemd</code> in <code>redis.conf</code> since I'm on Ubuntu and <code>systemctl</code> tells me the server is running and active.</p>
  
  <p>Should I worry/anticipate an issue or is it nothing?</p>