title: classpath issue in hadoop 0.23.0 java on Ubuntu 11.10
body: <pre><code>Client.java:6: package org.apache.hadoop.conf does not exist
  import org.apache.hadoop.conf.Configured;
                               ^
  Client.java:7: cannot find symbol
  symbol  : class Tool
  location: package org.apache.hadoop.util
  import org.apache.hadoop.util.Tool;
                               ^
  Client.java:8: cannot find symbol
  symbol  : class ToolRunner
  location: package org.apache.hadoop.util
  import org.apache.hadoop.util.ToolRunner;
                               ^
  Client.java:12: cannot find symbol
  symbol: class Configured
  public abstract class Client extends Configured implements Tool {
                                       ^
  Client.java:12: cannot find symbol
  symbol: class Tool
  public abstract class Client extends Configured implements Tool {
                                                             ^
  [checking Client]
  [total 685ms]
  5 errors
  </code></pre>
  
  <p>How do i need to set classpath.</p>
  
  <p>I set like this : </p>
  
  <pre><code>CLASSPATH=$CLASSPATH:$HADOOP_HOME::$HADOOP_HOME/modules:$HADOOP_HOME/lib
  </code></pre>
  
  <p>I cannot able to run even if i mention classpath in the commandline pointing to jars directly. </p>