title: How to start with db2 after installation
body: <p>I am new to db2. I have installed db2 and need to run the queries through terminal. I have LINUX machine.</p>
  
  <p>After installed run the below query or any queries like create database, it will display the error</p>
  
  <pre><code>db2 =&gt; start database manager
  SQL1092N  "ROOT" does not have the authority to perform the requested command 
  or operation.
  </code></pre>