title: Redis-cli && bash find keys with empty values
body: <p>How can i find all elements in redis which is empty
  i have keys like this:</p>
  
  <pre><code>setting:1
  setting:2
  setting:442
  </code></pre>
  
  <p>etc</p>
  
  <p>how can i search with redis-cli bash script command if any key contains empty value
  Something like <code>redis-cli keys \* | xargs -L 1 redis-cli get</code>
  with grep and check if value is empty</p>
  
  <p>found solution</p>
  
  <pre><code>redis-cli KEYS "settings:*" | xargs -L 1 redis-cli get
  </code></pre>