title: Get all hashes exists in redis
body: <p>I'm have hashes in redis cache like:</p>
  
  <pre><code>Hash         Key    Value
  hashme:1    Hello   World
  hashme:2    Here    Iam
  myhash:1    Next    One
  </code></pre>
  
  <p>My goal is to get the Hashes as output in the CLI like:</p>
  
  <pre><code>hashme
  myhash
  </code></pre>
  
  <p>If there's no such option, this is ok too:   </p>
  
  <pre><code> hashme:1
   hashme:2
   myhash:1
  </code></pre>
  
  <p>I didn't find any relevant command for it in Redis API.</p>
  
  <p>Any suggestions ?</p>