title: redis ERR unknown command 'UNLINK'
body: <p>I am facing issue while trying to use the UNLINK command with redis. Version that I am using is 5.0.8.</p>
  
  <p>Any work around with this?</p>
  
  <pre><code> root@test:/tmp/redis-stable# redis-cli --version 
   redis-cli 5.0.8
   root@test:/tmp/redis-stable# redis-cli
   127.0.0.1:6379&gt; keys
   (error) ERR wrong number of arguments for 'keys' command
   127.0.0.1:6379&gt; keys *
   1) "51"
   2) "key2"
   3) "key1"
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt; UNLINK key1
   (error) ERR unknown command 'UNLINK'
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt; UNLINK key1 key2
   (error) ERR unknown command 'UNLINK'
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt;
   127.0.0.1:6379&gt;
  </code></pre>
  
  <p>Is this a known issue or any version specific version..</p>
  
  <p>Regards,
  Vicky</p>