title: MongoDB not authorized for query admin.system.users
body: <p>I am bit new to MongoDb and I am using MongoDb v.2.4.Here the problem is that when I run the mongod with --auth parameter, even after authenticating I am not able to perform simple operations such as "show users". But works fine if I run mongod without --auth parameter.</p>
  
  <pre><code>&gt; use admin
  switched to db admin
  &gt; db.auth("dbadmin","mypassword")
  1
  &gt; show users
  **Thu Feb 27 16:50:17.695 error: { "$err" : "not authorized for query on admin.sys
  tem.users", "code" : 16550 } at src/mongo/shell/query.js:128**
  </code></pre>