title: Oracle client ORA-12541: TNS:no listener
body: <p>I am new on Oracle database, but I have one issue. 
  On my Database server (server1) listener and database instance run correctly and I can use <code>sqlplus</code> to connect to this DB.
  When I connect to database by using other server, I check the TNS configuration and it is correct but system says:                                    </p>
  
  <blockquote>
  <pre><code>ERROR:
  ORA-12541: TNS:no listener
  </code></pre>
  </blockquote>
  
  <p>My database is Oracle 10gR2</p>
  
  <p>So how can I solve this issue?</p>