HADOOP-3552. Add forrest documentation for Hadoop commands.

Contributed by Sharad Agarwal.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@672071 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -358,6 +358,9 @@ Release 0.18.0 - Unreleased
     especially for non-HDFS file systems. Deprecates
     InputFormat.validateInput. (tomwhite via omalley)
 
+    HADOOP-3552. Add forrest documentation for Hadoop commands.
+    (Sharad Agarwal via cdouglas)
+
   BUG FIXES
 
     HADOOP-2905. 'fsck -move' triggers NPE in NameNode. 

docs/changes.html

@@ -56,8 +56,11 @@
 </a></h2>
 <ul id="trunk_(unreleased_changes)_">
   <li><a href="javascript:toggleList('trunk_(unreleased_changes)_._incompatible_changes_')">  INCOMPATIBLE CHANGES
-</a>&nbsp;&nbsp;&nbsp;(none)
+</a>&nbsp;&nbsp;&nbsp;(1)
     <ol id="trunk_(unreleased_changes)_._incompatible_changes_">
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3595">HADOOP-3595</a>. Remove deprecated methods for mapred.combine.once
+functionality, which was necessary to providing backwards
+compatible combiner semantics for 0.18.<br />(cdouglas via omalley)</li>
     </ol>
   </li>
   <li><a href="javascript:toggleList('trunk_(unreleased_changes)_._new_features_')">  NEW FEATURES
@@ -66,8 +69,10 @@
     </ol>
   </li>
   <li><a href="javascript:toggleList('trunk_(unreleased_changes)_._improvements_')">  IMPROVEMENTS
-</a>&nbsp;&nbsp;&nbsp;(none)
+</a>&nbsp;&nbsp;&nbsp;(1)
     <ol id="trunk_(unreleased_changes)_._improvements_">
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3577">HADOOP-3577</a>. Tools to inject blocks into name node and simulated
+data nodes for testing.<br />(Sanjay Radia via hairong)</li>
     </ol>
   </li>
   <li><a href="javascript:toggleList('trunk_(unreleased_changes)_._optimizations_')">  OPTIMIZATIONS
@@ -87,7 +92,7 @@ easier to identify datanode and namenode related code.<br />(dhruba)</li>
 </a></h2>
 <ul id="release_0.18.0_-_unreleased_">
   <li><a href="javascript:toggleList('release_0.18.0_-_unreleased_._incompatible_changes_')">  INCOMPATIBLE CHANGES
-</a>&nbsp;&nbsp;&nbsp;(20)
+</a>&nbsp;&nbsp;&nbsp;(21)
     <ol id="release_0.18.0_-_unreleased_._incompatible_changes_">
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-2703">HADOOP-2703</a>.  The default options to fsck skips checking files
 that are being written to. The output of fsck is incompatible
@@ -152,10 +157,12 @@ FileSystem.<br />(lohit vijayarenu via cdouglas)</li>
 block in the log. Also include a CorruptedBlocks metric to track the size
 of the corrupted block map.<br />(cdouglas)</li>
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3512">HADOOP-3512</a>. Separate out the tools into a tools jar.<br />(omalley)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3598">HADOOP-3598</a>. Ensure that temporary task-output directories are not created
+if they are not necessary e.g. for Maps with no side-effect files.<br />(acmurthy)</li>
     </ol>
   </li>
   <li><a href="javascript:toggleList('release_0.18.0_-_unreleased_._new_features_')">  NEW FEATURES
-</a>&nbsp;&nbsp;&nbsp;(24)
+</a>&nbsp;&nbsp;&nbsp;(25)
     <ol id="release_0.18.0_-_unreleased_._new_features_">
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3074">HADOOP-3074</a>. Provides a UrlStreamHandler for DFS and other FS,
 relying on FileSystem<br />(taton)</li>
@@ -206,6 +213,8 @@ line.<br />(tomwhite via omalley)</li>
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3502">HADOOP-3502</a>. Quota API needs documentation in Forrest.<br />(hairong)</li>
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3413">HADOOP-3413</a>. Allow SequenceFile.Reader to use serialization
 framework.<br />(tomwhite via omalley)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3541">HADOOP-3541</a>. Import of the namespace from a checkpoint documented
+in hadoop user guide.<br />(shv)</li>
     </ol>
   </li>
   <li><a href="javascript:toggleList('release_0.18.0_-_unreleased_._improvements_')">  IMPROVEMENTS
@@ -323,7 +332,7 @@ InputFormat.validateInput.<br />(tomwhite via omalley)</li>
     </ol>
   </li>
   <li><a href="javascript:toggleList('release_0.18.0_-_unreleased_._bug_fixes_')">  BUG FIXES
-</a>&nbsp;&nbsp;&nbsp;(98)
+</a>&nbsp;&nbsp;&nbsp;(102)
     <ol id="release_0.18.0_-_unreleased_._bug_fixes_">
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-2905">HADOOP-2905</a>. 'fsck -move' triggers NPE in NameNode.<br />(Lohit Vjayarenu via rangadi)</li>
       <li>Increment ClientProtocol.versionID missed by <a href="http://issues.apache.org/jira/browse/HADOOP-2585">HADOOP-2585</a>.<br />(shv)</li>
@@ -519,6 +528,14 @@ instead of 4.<br />(Sriram Rao via omalley)</li>
 than a parameter.<br />(Owen O'Malley via cdouglas)</li>
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3590">HADOOP-3590</a>. Null pointer exception in JobTracker when the task tracker is
 not yet resolved.<br />(Amar Ramesh Kamat via ddas)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3603">HADOOP-3603</a>. Fix MapOutputCollector to spill when io.sort.spill.percent is
+1.0 and to detect spills when emitted records write no data.<br />(cdouglas)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3615">HADOOP-3615</a>. Set DatanodeProtocol.versionID to the correct value.
+(Tsz Wo (Nicholas), SZE via cdouglas)
+</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3559">HADOOP-3559</a>. Fix the libhdfs test script and config to work with the
+current semantics.<br />(lohit vijayarenu via cdouglas)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3480">HADOOP-3480</a>.  Need to update Eclipse template to reflect current trunk.<br />(Brice Arnould via tomwhite)</li>
     </ol>
   </li>
 </ul>
@@ -535,14 +552,16 @@ default, to clear the state of the serializer between objects.<br />(tomwhite vi
     </ol>
   </li>
   <li><a href="javascript:toggleList('release_0.17.1_-_unreleased_._improvements_')">  IMPROVEMENTS
-</a>&nbsp;&nbsp;&nbsp;(1)
+</a>&nbsp;&nbsp;&nbsp;(2)
     <ol id="release_0.17.1_-_unreleased_._improvements_">
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3522">HADOOP-3522</a>. Improve documentation on reduce pointing out that
 input keys and values will be reused.<br />(omalley)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3487">HADOOP-3487</a>. Balancer uses thread pools for managing its threads;
+therefore provides better resource management.<br />(hairong)</li>
     </ol>
   </li>
   <li><a href="javascript:toggleList('release_0.17.1_-_unreleased_._bug_fixes_')">  BUG FIXES
-</a>&nbsp;&nbsp;&nbsp;(10)
+</a>&nbsp;&nbsp;&nbsp;(13)
     <ol id="release_0.17.1_-_unreleased_._bug_fixes_">
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-2159">HADOOP-2159</a> Namenode stuck in safemode. The counter blockSafe should
 not be decremented for invalid blocks.<br />(hairong)</li>
@@ -565,6 +584,11 @@ Vijaya Renu via omalley)</li>
 to its subdirectory. (Tse Wo (Nicholas), SZE via hairong)
 </li>
       <li><a href="http://issues.apache.org/jira/browse/HADOOP-3320">HADOOP-3320</a>. Fix NullPointerException in NetworkTopology.getDistance().<br />(hairong)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3537">HADOOP-3537</a>. Disallow adding a datanode to a network topology when its
+network location is not resolved.<br />(hairong)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3571">HADOOP-3571</a>. Fix bug in block removal used in lease recovery.<br />(shv)</li>
+      <li><a href="http://issues.apache.org/jira/browse/HADOOP-3645">HADOOP-3645</a>. MetricsTimeVaryingRate returns wrong value for
+metric_avg_time.<br />(Lohit Vijayarenu via hairong)</li>
     </ol>
   </li>
 </ul>

docs/cluster_setup.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/commands_manual.html

@@ -0,0 +1,1132 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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+<div class="menupagetitle">Commands Manual</div>
+</div>
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+<a class="dida" href="commands_manual.pdf"><img alt="PDF -icon" src="skin/images/pdfdoc.gif" class="skin"><br>
+        PDF</a>
+</div>
+<h1>Commands Manual</h1>
+<div id="minitoc-area">
+<ul class="minitoc">
+<li>
+<a href="#Overview">Overview</a>
+<ul class="minitoc">
+<li>
+<a href="#Generic+Options">Generic Options</a>
+</li>
+</ul>
+</li>
+<li>
+<a href="#User+Commands"> User Commands </a>
+<ul class="minitoc">
+<li>
+<a href="#archive"> archive </a>
+</li>
+<li>
+<a href="#distcp"> distcp </a>
+</li>
+<li>
+<a href="#fs"> fs </a>
+</li>
+<li>
+<a href="#fsck"> fsck </a>
+</li>
+<li>
+<a href="#jar"> jar </a>
+</li>
+<li>
+<a href="#job"> job </a>
+</li>
+<li>
+<a href="#pipes"> pipes </a>
+</li>
+<li>
+<a href="#version"> version </a>
+</li>
+<li>
+<a href="#CLASSNAME"> CLASSNAME </a>
+</li>
+</ul>
+</li>
+<li>
+<a href="#Administration+Commands"> Administration Commands </a>
+<ul class="minitoc">
+<li>
+<a href="#balancer"> balancer </a>
+</li>
+<li>
+<a href="#daemonlog"> daemonlog </a>
+</li>
+<li>
+<a href="#datanode"> datanode</a>
+</li>
+<li>
+<a href="#dfsadmin"> dfsadmin </a>
+</li>
+<li>
+<a href="#jobtracker"> jobtracker </a>
+</li>
+<li>
+<a href="#namenode"> namenode </a>
+</li>
+<li>
+<a href="#secondarynamenode"> secondarynamenode </a>
+</li>
+<li>
+<a href="#tasktracker"> tasktracker </a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+		
+<a name="N1000D"></a><a name="Overview"></a>
+<h2 class="h3">Overview</h2>
+<div class="section">
+<p>
+				All the hadoop commands are invoked by the bin/hadoop script. Running hadoop
+				script without any arguments prints the description for all commands.
+			</p>
+<p>
+				
+<span class="codefrag">Usage: hadoop [--config confdir] [COMMAND] [GENERIC_OPTIONS] [COMMAND_OPTIONS]</span>
+			
+</p>
+<p>
+				Hadoop has an option parsing framework that employs parsing generic options as well as running classes.
+			</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">--config confdir</span></td>
+			            <td colspan="1" rowspan="1">Overwrites the default Configuration directory. Default is ${HADOOP_HOME}/conf.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">GENERIC_OPTIONS</span></td>
+			            <td colspan="1" rowspan="1">The common set of options supported by multiple commands.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">COMMAND</span>
+<br>
+<span class="codefrag">COMMAND_OPTIONS</span></td>
+			            <td colspan="1" rowspan="1">Various commands with their options are described in the following sections. The commands 
+			            have been grouped into <a href="commands_manual.html#User+Commands">User Commands</a> 
+			            and <a href="commands_manual.html#Administration+Commands">Administration Commands</a>.</td>
+			           
+</tr>
+			     
+</table>
+<a name="N10061"></a><a name="Generic+Options"></a>
+<h3 class="h4">Generic Options</h3>
+<p>
+				  Following are supported by <a href="commands_manual.html#dfsadmin">dfsadmin</a>, 
+				  <a href="commands_manual.html#fs">fs</a>, <a href="commands_manual.html#fsck">fsck</a> and 
+				  <a href="commands_manual.html#job">job</a>.
+				</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> GENERIC_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-conf &lt;configuration file&gt;</span></td>
+			            <td colspan="1" rowspan="1">Specify an application configuration file.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-D &lt;property=value&gt;</span></td>
+			            <td colspan="1" rowspan="1">Use value for given property.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-fs &lt;local|namenode:port&gt;</span></td>
+			            <td colspan="1" rowspan="1">Specify a namenode.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-jt &lt;local|jobtracker:port&gt;</span></td>
+			            <td colspan="1" rowspan="1">Specify a job tracker. Applies only to <a href="commands_manual.html#job">job</a>.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-files &lt;comma separated list of files&gt;</span></td>
+			            <td colspan="1" rowspan="1">Specify comma separated files to be copied to the map reduce cluster. 
+			            Applies only to <a href="commands_manual.html#job">job</a>.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-libjars &lt;comma seperated list of jars&gt;</span></td>
+			            <td colspan="1" rowspan="1">Specify comma separated jar files to include in the classpath. 
+			            Applies only to <a href="commands_manual.html#job">job</a>.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-archives &lt;comma separated list of archives&gt;</span></td>
+			            <td colspan="1" rowspan="1">Specify comma separated archives to be unarchived on the compute machines. 
+			            Applies only to <a href="commands_manual.html#job">job</a>.</td>
+			           
+</tr>
+				
+</table>
+</div>
+		
+		
+<a name="N100FB"></a><a name="User+Commands"></a>
+<h2 class="h3"> User Commands </h2>
+<div class="section">
+<p>Commands useful for users of a hadoop cluster.</p>
+<a name="N10104"></a><a name="archive"></a>
+<h3 class="h4"> archive </h3>
+<p>
+					Creates a hadoop archive. More information can be found at <a href="hadoop_archives.html">Hadoop Archives</a>.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop archive -archiveName NAME &lt;src&gt;* &lt;dest&gt;</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+					   
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-archiveName NAME</span></td>
+			            <td colspan="1" rowspan="1">Name of the archive to be created.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">src</span></td>
+			            <td colspan="1" rowspan="1">Filesystem pathnames which work as usual with regular expressions.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">dest</span></td>
+			            <td colspan="1" rowspan="1">Destination directory which would contain the archive.</td>
+			           
+</tr>
+			     
+</table>
+<a name="N1014F"></a><a name="distcp"></a>
+<h3 class="h4"> distcp </h3>
+<p>
+					Copy file or directories recursively. More information can be found at <a href="distcp.html">DistCp Guide</a>.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop distcp &lt;srcurl&gt; &lt;desturl&gt;</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">srcurl</span></td>
+			            <td colspan="1" rowspan="1">Source Url</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">desturl</span></td>
+			            <td colspan="1" rowspan="1">Destination Url</td>
+			           
+</tr>
+			     
+</table>
+<a name="N1018C"></a><a name="fs"></a>
+<h3 class="h4"> fs </h3>
+<p>
+					
+<span class="codefrag">Usage: hadoop fs [</span><a href="commands_manual.html#Generic+Options">GENERIC_OPTIONS</a><span class="codefrag">] 
+					[COMMAND_OPTIONS]</span>
+				
+</p>
+<p>
+					Runs a generic filesystem user client.
+				</p>
+<p>
+					The various COMMAND_OPTIONS can be found at <a href="hdfs_shell.html">HDFS Shell Guide</a>.
+				</p>
+<a name="N101A8"></a><a name="fsck"></a>
+<h3 class="h4"> fsck </h3>
+<p>
+					Runs a HDFS filesystem checking utility. See <a href="hdfs_user_guide.html#Fsck">Fsck</a> for more info.
+				</p>
+<p>
+<span class="codefrag">Usage: hadoop fsck [</span><a href="commands_manual.html#Generic+Options">GENERIC_OPTIONS</a><span class="codefrag">] 
+				&lt;path&gt; [-move | -delete | -openforwrite] [-files [-blocks 
+				[-locations | -racks]]]</span>
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			          
+<tr>
+			            
+<td colspan="1" rowspan="1"><span class="codefrag">&lt;path&gt;</span></td>
+			            <td colspan="1" rowspan="1">Start checking from this path.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-move</span></td>
+			            <td colspan="1" rowspan="1">Move corrupted files to /lost+found</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-delete</span></td>
+			            <td colspan="1" rowspan="1">Delete corrupted files.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-openforwrite</span></td>
+			            <td colspan="1" rowspan="1">Print out files opened for write.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-files</span></td>
+			            <td colspan="1" rowspan="1">Print out files being checked.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-blocks</span></td>
+			            <td colspan="1" rowspan="1">Print out block report.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-locations</span></td>
+			            <td colspan="1" rowspan="1">Print out locations for every block.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-racks</span></td>
+			            <td colspan="1" rowspan="1">Print out network topology for data-node locations.</td>
+			           
+</tr>
+					
+</table>
+<a name="N1023C"></a><a name="jar"></a>
+<h3 class="h4"> jar </h3>
+<p>
+					Runs a jar file. Users can bundle their Map Reduce code in a jar file and execute it using this command.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop jar &lt;jar&gt; [mainClass] args...</span>
+				
+</p>
+<p>
+					The streaming jobs are run via this command. Examples can be referred from 
+					<a href="streaming.html#More+usage+examples">Streaming examples</a>
+				
+</p>
+<p>
+					Word count example is also run using jar command. It can be referred from
+					<a href="mapred_tutorial.html#Usage">Wordcount example</a>
+				
+</p>
+<a name="N1025A"></a><a name="job"></a>
+<h3 class="h4"> job </h3>
+<p>
+					Command to interact with Map Reduce Jobs.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop job [</span><a href="commands_manual.html#Generic+Options">GENERIC_OPTIONS</a><span class="codefrag">] 
+					[-submit &lt;job-file&gt;] | [-status &lt;job-id&gt;] | 
+					[-counter &lt;job-id&gt; &lt;group-name&gt; &lt;counter-name&gt;] | [-kill &lt;job-id&gt;] | 
+					[-events &lt;job-id&gt; &lt;from-event-#&gt; &lt;#-of-events&gt;] | [-history [all] &lt;jobOutputDir&gt;] |
+					[-list [all]] | [-kill-task &lt;task-id&gt;] | [-fail-task &lt;task-id&gt;]</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-submit &lt;job-file&gt;</span></td>
+			            <td colspan="1" rowspan="1">Submits the job.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-status &lt;job-id&gt;</span></td>
+			            <td colspan="1" rowspan="1">Prints the map and reduce completion percentage and all job counters.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-counter &lt;job-id&gt; &lt;group-name&gt; &lt;counter-name&gt;</span></td>
+			            <td colspan="1" rowspan="1">Prints the counter value.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-kill &lt;job-id&gt;</span></td>
+			            <td colspan="1" rowspan="1">Kills the job.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-events &lt;job-id&gt; &lt;from-event-#&gt; &lt;#-of-events&gt;</span></td>
+			            <td colspan="1" rowspan="1">Prints the events' details received by jobtracker for the given range.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-history [all] &lt;jobOutputDir&gt;</span></td>
+			            <td colspan="1" rowspan="1">-history &lt;jobOutputDir&gt; prints job details, failed and killed tip details. More details 
+			            about the job such as successful tasks and task attempts made for each task can be viewed by 
+			            specifying the [all] option. </td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-list [all]</span></td>
+			            <td colspan="1" rowspan="1">-list all displays all jobs. -list displays only jobs which are yet to complete.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-kill-task &lt;task-id&gt;</span></td>
+			            <td colspan="1" rowspan="1">Kills the task. Killed tasks are NOT counted against failed attempts.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-fail-task &lt;task-id&gt;</span></td>
+			            <td colspan="1" rowspan="1">Fails the task. Failed tasks are counted against failed attempts.</td>
+			           
+</tr>
+					
+</table>
+<a name="N102FA"></a><a name="pipes"></a>
+<h3 class="h4"> pipes </h3>
+<p>
+					Runs a pipes job.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop pipes [-conf &lt;path&gt;] [-jobconf &lt;key=value&gt;, &lt;key=value&gt;, ...] 
+					[-input &lt;path&gt;] [-output &lt;path&gt;] [-jar &lt;jar file&gt;] [-inputformat &lt;class&gt;] 
+					[-map &lt;class&gt;] [-partitioner &lt;class&gt;] [-reduce &lt;class&gt;] [-writer &lt;class&gt;] 
+					[-program &lt;executable&gt;] [-reduces &lt;num&gt;] </span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			          
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-conf &lt;path&gt;</span></td>
+			            <td colspan="1" rowspan="1">Configuration for job</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-jobconf &lt;key=value&gt;, &lt;key=value&gt;, ...</span></td>
+			            <td colspan="1" rowspan="1">Add/override configuration for job</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-input &lt;path&gt;</span></td>
+			            <td colspan="1" rowspan="1">Input directory</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-output &lt;path&gt;</span></td>
+			            <td colspan="1" rowspan="1">Output directory</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-jar &lt;jar file&gt;</span></td>
+			            <td colspan="1" rowspan="1">Jar filename</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-inputformat &lt;class&gt;</span></td>
+			            <td colspan="1" rowspan="1">InputFormat class</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-map &lt;class&gt;</span></td>
+			            <td colspan="1" rowspan="1">Java Map class</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-partitioner &lt;class&gt;</span></td>
+			            <td colspan="1" rowspan="1">Java Partitioner</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-reduce &lt;class&gt;</span></td>
+			            <td colspan="1" rowspan="1">Java Reduce class</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-writer &lt;class&gt;</span></td>
+			            <td colspan="1" rowspan="1">Java RecordWriter</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-program &lt;executable&gt;</span></td>
+			            <td colspan="1" rowspan="1">Executable URI</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-reduces &lt;num&gt;</span></td>
+			            <td colspan="1" rowspan="1">Number of reduces</td>
+			           
+</tr>
+					
+</table>
+<a name="N103BF"></a><a name="version"></a>
+<h3 class="h4"> version </h3>
+<p>
+					Prints the version.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop version</span>
+				
+</p>
+<a name="N103CF"></a><a name="CLASSNAME"></a>
+<h3 class="h4"> CLASSNAME </h3>
+<p>
+					 hadoop script can be used to invoke any class.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop CLASSNAME</span>
+				
+</p>
+<p>
+					 Runs the class named CLASSNAME.
+				</p>
+</div>
+		
+		
+<a name="N103E3"></a><a name="Administration+Commands"></a>
+<h2 class="h3"> Administration Commands </h2>
+<div class="section">
+<p>Commands useful for administrators of a hadoop cluster.</p>
+<a name="N103EC"></a><a name="balancer"></a>
+<h3 class="h4"> balancer </h3>
+<p>
+					Runs a cluster balancing utility. An administrator can simply press Ctrl-C to stop the 
+					rebalancing process. See <a href="hdfs_user_guide.html#Rebalancer">Rebalancer</a> for more details.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop balancer [-threshold &lt;threshold&gt;]</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-threshold &lt;threshold&gt;</span></td>
+			            <td colspan="1" rowspan="1">Percentage of disk capacity. This overwrites the default threshold.</td>
+			           
+</tr>
+			     
+</table>
+<a name="N1041B"></a><a name="daemonlog"></a>
+<h3 class="h4"> daemonlog </h3>
+<p>
+					 Get/Set the log level for each daemon.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop daemonlog  -getlevel &lt;host:port&gt; &lt;name&gt;</span>
+<br>
+					
+<span class="codefrag">Usage: hadoop daemonlog  -setlevel &lt;host:port&gt; &lt;name&gt; &lt;level&gt;</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-getlevel &lt;host:port&gt; &lt;name&gt;</span></td>
+			            <td colspan="1" rowspan="1">Prints the log level of the daemon running at &lt;host:port&gt;. 
+			            This command internally connects to http://&lt;host:port&gt;/logLevel?log=&lt;name&gt;</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-setlevel &lt;host:port&gt; &lt;name&gt; &lt;level&gt;</span></td>
+			            <td colspan="1" rowspan="1">Sets the log level of the daemon running at &lt;host:port&gt;. 
+			            This command internally connects to http://&lt;host:port&gt;/logLevel?log=&lt;name&gt;</td>
+			           
+</tr>
+			     
+</table>
+<a name="N10458"></a><a name="datanode"></a>
+<h3 class="h4"> datanode</h3>
+<p>
+					Runs a HDFS datanode.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop datanode [-rollback]</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-rollback</span></td>
+			            <td colspan="1" rowspan="1">Rollsback the datanode to the previous version. This should be used after stopping the datanode 
+			            and distributing the old hadoop version.</td>
+			           
+</tr>
+			     
+</table>
+<a name="N10483"></a><a name="dfsadmin"></a>
+<h3 class="h4"> dfsadmin </h3>
+<p>
+					Runs a HDFS dfsadmin client.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop dfsadmin  [</span><a href="commands_manual.html#Generic+Options">GENERIC_OPTIONS</a><span class="codefrag">] [-report] [-safemode enter | leave | get | wait] [-refreshNodes]
+					 [-finalizeUpgrade] [-upgradeProgress status | details | force] [-metasave filename] 
+					 [-setQuota &lt;quota&gt; &lt;dirname&gt;...&lt;dirname&gt;] [-clrQuota &lt;dirname&gt;...&lt;dirname&gt;] 
+					 [-help [cmd]]</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-report</span></td>
+			            <td colspan="1" rowspan="1">Reports basic filesystem information and statistics.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-safemode enter | leave | get | wait</span></td>
+			            <td colspan="1" rowspan="1">Safe mode maintenance command.
+                Safe mode is a Namenode state in which it <br>
+                        1.  does not accept changes to the name space (read-only) <br> 
+                        2.  does not replicate or delete blocks. <br>
+                Safe mode is entered automatically at Namenode startup, and
+                leaves safe mode automatically when the configured minimum
+                percentage of blocks satisfies the minimum replication
+                condition.  Safe mode can also be entered manually, but then
+                it can only be turned off manually as well.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-refreshNodes</span></td>
+			            <td colspan="1" rowspan="1">Re-read the hosts and exclude files to update the set
+                of Datanodes that are allowed to connect to the Namenode
+                and those that should be decommissioned or recommissioned.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-finalizeUpgrade</span></td>
+			            <td colspan="1" rowspan="1">Finalize upgrade of HDFS.
+                Datanodes delete their previous version working directories,
+                followed by Namenode doing the same.
+                This completes the upgrade process.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-upgradeProgress status | details | force</span></td>
+			            <td colspan="1" rowspan="1">Request current distributed upgrade status,
+                a detailed status or force the upgrade to proceed.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-metasave filename</span></td>
+			            <td colspan="1" rowspan="1">Save Namenode's primary data structures
+                to &lt;filename&gt; in the directory specified by hadoop.log.dir property.
+                &lt;filename&gt; will contain one line for each of the following <br>
+                        1. Datanodes heart beating with Namenode<br>
+                        2. Blocks waiting to be replicated<br>
+                        3. Blocks currrently being replicated<br>
+                        4. Blocks waiting to be deleted</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-setQuota &lt;quota&gt; &lt;dirname&gt;...&lt;dirname&gt;</span></td>
+			            <td colspan="1" rowspan="1">Set the quota &lt;quota&gt; for each directory &lt;dirname&gt;.
+                The directory quota is a long integer that puts a hard limit on the number of names in the directory tree.<br>
+                Best effort for the directory, with faults reported if<br>
+                1. N is not a positive integer, or<br>
+                2. user is not an administrator, or<br>
+                3. the directory does not exist or is a file, or<br>
+                4. the directory would immediately exceed the new quota.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-clrQuota &lt;dirname&gt;...&lt;dirname&gt;</span></td>
+			            <td colspan="1" rowspan="1">Clear the quota for each directory &lt;dirname&gt;.<br>
+                Best effort for the directory. with fault reported if<br>
+                1. the directory does not exist or is a file, or<br>
+                2. user is not an administrator.<br>
+                It does not fault if the directory has no quota.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-help [cmd]</span></td>
+			            <td colspan="1" rowspan="1"> Displays help for the given command or all commands if none
+                is specified.</td>
+			           
+</tr>
+			     
+</table>
+<a name="N10543"></a><a name="jobtracker"></a>
+<h3 class="h4"> jobtracker </h3>
+<p>
+					Runs the MapReduce job Tracker node.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop jobtracker</span>
+				
+</p>
+<a name="N10553"></a><a name="namenode"></a>
+<h3 class="h4"> namenode </h3>
+<p>
+					Runs the namenode. More info about the upgrade, rollback and finalize is at 
+					<a href="hdfs_user_guide.html#Upgrade+and+Rollback">Upgrade Rollback</a>
+				
+</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop namenode [-format] | [-upgrade] | [-rollback] | [-finalize] | [-importCheckpoint]</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-format</span></td>
+			            <td colspan="1" rowspan="1">Formats the namenode. It starts the namenode, formats it and then shut it down.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-upgrade</span></td>
+			            <td colspan="1" rowspan="1">Namenode should be started with upgrade option after the distribution of new hadoop version.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-rollback</span></td>
+			            <td colspan="1" rowspan="1">Rollsback the namenode to the previous version. This should be used after stopping the cluster 
+			            and distributing the old hadoop version.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-finalize</span></td>
+			            <td colspan="1" rowspan="1">Finalize will remove the previous state of the files system. Recent upgrade will become permanent. 
+			            Rollback option will not be available anymore. After finalization it shuts the namenode down.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-importCheckpoint</span></td>
+			            <td colspan="1" rowspan="1">Loads image from a checkpoint directory and save it into the current one. Checkpoint dir 
+			            is read from property fs.checkpoint.dir</td>
+			           
+</tr>
+			     
+</table>
+<a name="N105BA"></a><a name="secondarynamenode"></a>
+<h3 class="h4"> secondarynamenode </h3>
+<p>
+					Runs the HDFS secondary namenode. See <a href="hdfs_user_guide.html#Secondary+Namenode">Secondary Namenode</a> 
+					for more info.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop secondarynamenode [-checkpoint [force]] | [-geteditsize]</span>
+				
+</p>
+<table class="ForrestTable" cellspacing="1" cellpadding="4">
+			          
+<tr>
+<th colspan="1" rowspan="1"> COMMAND_OPTION </th><th colspan="1" rowspan="1"> Description </th>
+</tr>
+			
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-checkpoint [force]</span></td>
+			            <td colspan="1" rowspan="1">Checkpoints the Secondary namenode if EditLog size &gt;= fs.checkpoint.size. 
+			            If -force is used, checkpoint irrespective of EditLog size.</td>
+			           
+</tr>
+			           
+<tr>
+			          	
+<td colspan="1" rowspan="1"><span class="codefrag">-geteditsize</span></td>
+			            <td colspan="1" rowspan="1">Prints the EditLog size.</td>
+			           
+</tr>
+			     
+</table>
+<a name="N105F7"></a><a name="tasktracker"></a>
+<h3 class="h4"> tasktracker </h3>
+<p>
+					Runs a MapReduce task Tracker node.
+				</p>
+<p>
+					
+<span class="codefrag">Usage: hadoop tasktracker</span>
+				
+</p>
+</div>
+		
+		
+		      
+
+	
+</div>
+<!--+
+    |end content
+    +-->
+<div class="clearboth">&nbsp;</div>
+</div>
+<div id="footer">
+<!--+
+    |start bottomstrip
+    +-->
+<div class="lastmodified">
+<script type="text/javascript"><!--
+document.write("Last Published: " + document.lastModified);
+//  --></script>
+</div>
+<div class="copyright">
+        Copyright &copy;
+         2007 <a href="http://www.apache.org/licenses/">The Apache Software Foundation.</a>
+</div>
+<!--+
+    |end bottomstrip
+    +-->
+</div>
+</body>
+</html>

docs/distcp.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menupage">

docs/hadoop_archives.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hdfs_design.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hdfs_permissions_guide.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hdfs_quota_admin_guide.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <div class="menupagetitle">HDFS Quotas Administrator Guide</div>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hdfs_shell.html

@@ -125,6 +125,9 @@ document.write("Last Published: " + document.lastModified);
 <div class="menuitem">
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
+<div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
 <div class="menupage">
 <div class="menupagetitle">FS Shell Guide</div>
 </div>

docs/hdfs_user_guide.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">
@@ -453,8 +456,11 @@ document.write("Last Published: " + document.lastModified);
    	</li>
    	
 </ul>
+<p>
+   	  For command usage, see <a href="commands_manual.html#dfsadmin">dfsadmin command</a>.
+   	</p>
 </div> 
-<a name="N100E6"></a><a name="Secondary+Namenode"></a>
+<a name="N100ED"></a><a name="Secondary+Namenode"></a>
 <h2 class="h3"> Secondary Namenode </h2>
 <div class="section">
 <p>
@@ -535,8 +541,11 @@ document.write("Last Published: " + document.lastModified);
      The name-node verifies that the image in <span class="codefrag">fs.checkpoint.dir</span> is
      consistent, but does not modify it in any way.
    </p>
+<p>
+     For command usage, see <a href="commands_manual.html#secondarynamenode">secondarynamenode command</a>.
+   </p>
 </div> 
-<a name="N10147"></a><a name="Rebalancer"></a>
+<a name="N10155"></a><a name="Rebalancer"></a>
 <h2 class="h3"> Rebalancer </h2>
 <div class="section">
 <p>
@@ -580,8 +589,11 @@ document.write("Last Published: " + document.lastModified);
       is attached to
       <a href="http://issues.apache.org/jira/browse/HADOOP-1652">HADOOP-1652</a>.
     </p>
+<p>
+     For command usage, see <a href="commands_manual.html#balancer">balancer command</a>.
+   </p>
 </div> 
-<a name="N1016E"></a><a name="Rack+Awareness"></a>
+<a name="N10183"></a><a name="Rack+Awareness"></a>
 <h2 class="h3"> Rack Awareness </h2>
 <div class="section">
 <p>
@@ -600,7 +612,7 @@ document.write("Last Published: " + document.lastModified);
       <a href="http://issues.apache.org/jira/browse/HADOOP-692">HADOOP-692</a>.
     </p>
 </div> 
-<a name="N1018C"></a><a name="Safemode"></a>
+<a name="N101A1"></a><a name="Safemode"></a>
 <h2 class="h3"> Safemode </h2>
 <div class="section">
 <p>
@@ -620,7 +632,7 @@ document.write("Last Published: " + document.lastModified);
       <a href="http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/dfs/NameNode.html#setSafeMode(org.apache.hadoop.dfs.FSConstants.SafeModeAction)"><span class="codefrag">setSafeMode()</span></a>.
     </p>
 </div> 
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+<a name="N101BF"></a><a name="Fsck"></a>
 <h2 class="h3"> Fsck </h2>
 <div class="section">
 <p>    
@@ -634,10 +646,11 @@ document.write("Last Published: " + document.lastModified);
       fsck ignores open files but provides an option to select during reporting.
       HDFS' fsck is not a
       Hadoop shell command. It can be run as '<span class="codefrag">bin/hadoop fsck</span>'.
+      For command usage, see <a href="commands_manual.html#fsck">fsck command</a>. 
       Fsck can be run on the whole filesystem or on a subset of files.
      </p>
 </div> 
-<a name="N101BA"></a><a name="Upgrade+and+Rollback"></a>
+<a name="N101D3"></a><a name="Upgrade+and+Rollback"></a>
 <h2 class="h3"> Upgrade and Rollback </h2>
 <div class="section">
 <p>
@@ -696,7 +709,7 @@ document.write("Last Published: " + document.lastModified);
       
 </ul>
 </div> 
-<a name="N101FB"></a><a name="File+Permissions+and+Security"></a>
+<a name="N10214"></a><a name="File+Permissions+and+Security"></a>
 <h2 class="h3"> File Permissions and Security </h2>
 <div class="section">
 <p>           
@@ -709,7 +722,7 @@ document.write("Last Published: " + document.lastModified);
       <a href="hdfs_permissions_guide.html"><em>Permissions User and Administrator Guide</em></a>.
      </p>
 </div> 
-<a name="N1020D"></a><a name="Scalability"></a>
+<a name="N10226"></a><a name="Scalability"></a>
 <h2 class="h3"> Scalability </h2>
 <div class="section">
 <p>
@@ -727,7 +740,7 @@ document.write("Last Published: " + document.lastModified);
       suggested configuration improvements for large Hadoop clusters.
      </p>
 </div> 
-<a name="N1021F"></a><a name="Related+Documentation"></a>
+<a name="N10238"></a><a name="Related+Documentation"></a>
 <h2 class="h3"> Related Documentation </h2>
 <div class="section">
 <p>
@@ -772,6 +785,12 @@ document.write("Last Published: " + document.lastModified);
          description of most of the configuration variables available.
       </li>
       
+<li>
+        
+<a href="commands_manual.html">Commands Manual</a> 
+        : commands usage.
+      </li>
+      
 </ul>
 </div>
      

docs/hod.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hod_admin_guide.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hod_config_guide.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/hod_user_guide.html

@@ -128,6 +128,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/index.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

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@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
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 </div>
 <div class="menuitem">
@@ -243,6 +246,12 @@ document.write("Last Published: " + document.lastModified);
 </li>
 </ul>
     
+<ul>
+<li>
+<a href="commands_manual.html">Commands Manual</a>&nbsp;&nbsp;___________________&nbsp;&nbsp;<em>commands</em>
+</li>
+</ul>
+    
 <ul>
 <li>
 <a href="hdfs_shell.html">FS Shell Guide</a>&nbsp;&nbsp;___________________&nbsp;&nbsp;<em>fs</em>

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docs/mapred_tutorial.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/native_libraries.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/quickstart.html

@@ -126,6 +126,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

docs/streaming.html

@@ -129,6 +129,9 @@ document.write("Last Published: " + document.lastModified);
 <a href="hdfs_quota_admin_guide.html">HDFS Quotas Administrator Guide</a>
 </div>
 <div class="menuitem">
+<a href="commands_manual.html">Commands Manual</a>
+</div>
+<div class="menuitem">
 <a href="hdfs_shell.html">FS Shell Guide</a>
 </div>
 <div class="menuitem">

src/docs/src/documentation/content/xdocs/hdfs_user_guide.xml

@@ -192,6 +192,9 @@
    		: removes previous backup of the cluster made during last upgrade.
    	</li>
    	</ul>
+   	<p>
+   	  For command usage, see <a href="commands_manual.html#dfsadmin">dfsadmin command</a>.
+   	</p>  
    </section>
    
    </section> <section> <title> Secondary Namenode </title>
@@ -264,6 +267,9 @@
      The name-node verifies that the image in <code>fs.checkpoint.dir</code> is
      consistent, but does not modify it in any way.
    </p>
+   <p>
+     For command usage, see <a href="commands_manual.html#secondarynamenode">secondarynamenode command</a>.
+   </p>
    
    </section> <section> <title> Rebalancer </title>
     <p>
@@ -302,6 +308,9 @@
       is attached to
       <a href="http://issues.apache.org/jira/browse/HADOOP-1652">HADOOP-1652</a>.
     </p>
+    <p>
+     For command usage, see <a href="commands_manual.html#balancer">balancer command</a>.
+   </p>
     
    </section> <section> <title> Rack Awareness </title>
     <p>
@@ -350,6 +359,7 @@
       fsck ignores open files but provides an option to select during reporting.
       HDFS' fsck is not a
       Hadoop shell command. It can be run as '<code>bin/hadoop fsck</code>'.
+      For command usage, see <a href="commands_manual.html#fsck">fsck command</a>. 
       Fsck can be run on the whole filesystem or on a subset of files.
      </p>
      
@@ -460,6 +470,10 @@
          It includes brief 
          description of most of the configuration variables available.
       </li>
+      <li>
+        <a href="commands_manual.html">Commands Manual</a> 
+        : commands usage.
+      </li>
       </ul>
      </section>
      

src/docs/src/documentation/content/xdocs/site.xml

@@ -39,6 +39,7 @@ See http://forrest.apache.org/docs/linking.html for more info.
     <hdfs      label="HDFS User Guide"    href="hdfs_user_guide.html" />
     <hdfs      label="HDFS Permissions Guide"    href="hdfs_permissions_guide.html" />
     <hdfs      label="HDFS Quotas Administrator Guide" href="hdfs_quota_admin_guide.html" />
+    <commands  label="Commands Manual"     href="commands_manual.html" />
     <fs        label="FS Shell Guide"     href="hdfs_shell.html" />
     <distcp    label="DistCp Guide"       href="distcp.html" />
     <mapred    label="Map-Reduce Tutorial" href="mapred_tutorial.html" />