由於測試學習用，所以安裝三個虛擬機：
s1=192.198.56.101
s1=192.198.56.102
s1=192.198.56.103修改hosts文件：
#vim /etc/hosts //加入最下面
192.168.56.101 hadoop1
192.168.56.102 hadoop2
192.168.56.103 hadoop31，（101，102，103）上安裝jdk：
下載地址：http://download.chinaunix.net/down.php?id=33931&ResourceID=61&site=1
#cd /usr/local/
#wget -c http://download.chinaunix.net/down.php?id=33931&ResourceID=61&site=1
#chmod +x ./jdk-6u26-dlj-linux-i586.bin
#./jdk-6u26-dlj-linux-i586.bin看到lucese協議，擼到底輸入yes，或者直接q，然後輸入yes，等待完成
2，（101，102，103）增加環境變量：
#vim + /etc/profile //文件最底部加入
export JAVA_HOME=/usr/local/jdk1.6.0_26/
export CLASSPATH=.:$JAVA_HOME/lib.tools.jar
export PATH=$JAVA_HOME/bin:$PATH#source /ect/profile
3，配置ssh key免密碼登錄：
（1）#ssh-keygen -t rsa //一路回車即可，在三臺機器上都要執行
（2）然後將每臺服務器上的id_rsa.pub均拷貝到其他服務上命名爲authorized_keys
（3）在101服務器上：
#scp ~/root/.ssh/id_rsa.pub [email protected]:/root/.ssh/authorized_keys
#scp ~/root/.ssh/id_rsa.pub [email protected]:/root/.ssh/authorized_keys
（4）到102和103服務器上：
#cd ~/.ssh/
#cat id_rsa.pub >> authorized_keys
（5）將102服務器上的~/root/.ssh/id_rsa.pub，追加到101和103服務器的~/root/.ssh/authorized_keys最下面，注意是追加不是覆蓋
（6）到101和103服務器上：
#cd ~/.ssh/
#cat id_rsa.pub >> authorized_keys
（7）將103服務器上的~/root/.ssh/id_rsa.pub，追加到102和101服務器的~/root/.ssh/authorized_keys最下面，注意是追加不是覆蓋
（8）到102和101服務器上：
#cd ~/.ssh/
#cat id_rsa.pub >> authorized_keys
做完上述步驟之後，三臺服務器均可以免密碼互相登錄了。4，（101）安裝hadoop：
#cd /usr/local/
#wget -c http://mirror.bit.edu.cn/apache/hadoop/common/hadoop-2.2.0/hadoop-2.2.0.tar.gz
#tar zxvf hadoop-2.2.0.tar.gz
#cd hadoop-2.2.0/etc/hadoop/
#vim hadoop-env.sh //找到export JAVA_HOME=${JAVA_HOME}複製一行，按兩次yy
注視掉一行，
將未註釋的改爲：export JAVA_HOME=/usr/local/jdk1.6.0_26/
5，編輯core-site.xml文件：
#vim core-site.xml //將下面內容加入文件的<configuration>這裏</configuration><property>
<name>fs.defaultFS</name>
<value>hdfs://hadoop1:9000</value>
</property>
<property>
<name>io.file.buffer.size</name>
<value>131072</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/usr/local/hadoop-2.2.0/tmp</value>
<description>Abase for other temporary directories.</description>
</property>
<property>
<name>hadoop.proxyuser.hduser.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hduser.groups</name>
<value>*</value>
</property>6，編輯mapred-site.xml文件：
#vim mapred-site.xml // 將下面內容加入文件的<configuration>這裏</configuration><property>
<name>mapred.job.tracker</name>
<value>hadoop1:9001</value>
</property>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>hadoop1:10020</value>
</property>
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>hadoop1:19888</value>
</property>7，編輯hdfs-site.xml
#vim hdfs-site.xml // 將下面內容加入文件的<configuration>這裏</configuration>
<property>
<name>dfs.namenode.secondary.http-address</name>
<value>hadoop1:9001</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>/usr/local/hadoop-2.2.0/tmp/hdfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>/usr/local/hadoop-2.2.0/tmp/hdfs/data</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.webhdfs.enabled</name>
<value>true</value>
</property>8，編輯yarn-site.xml文件：
#vim yarn-site.xml //將下面內容加入文件的<configuration>這裏</configuration><property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
<value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
<property>
<name>yarn.resourcemanager.address</name>
<value>hadoop1:8032</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>hadoop1:8030</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>hadoop1:8031</value>
</property>
<property>
<name>yarn.resourcemanager.admin.address</name>
<value>hadoop1:8033</value>
</property>
<property>
<name>yarn.resourcemanager.webapp.address</name>
<value>hadoop1:8088</value>
</property>9，編輯slaves文件：
#vim slaves //改爲如下內容hadoop1
hadoop2
hadoop310，複製hadoo到其他兩臺機器：
#scp /usr/local/hadoop-2.2.0 [email protected]:/usr/local/
#scp /usr/local/hadoop-2.2.0 [email protected]:/usr/local/#vim + /etc/profile //在末尾追加如下內容export HADOOP_HOME=/usr/local/hadoop-2.2.0
export PATH=.:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$JAVA_HOME/bin:$PATH
#source /etc/profile12，在三臺服務器上創建目錄並給予讀寫權限：
#mkdir /usr/local/hadoop-2.2.0/tmp /usr/local/hadoop-2.2.0/tmp/hdfs /usr/local/hadoop-2.2.0/tmp/hdfs/name /usr/local/hadoop-2.2.0/tmp/hdfs/data
#chmod -R 0777 /usr/local/hadoop-2.2.0/tmp /usr/local/hadoop-2.2.0/tmp/hdfs /usr/local/hadoop-2.2.0/tmp/hdfs/name /usr/local/hadoop-2.2.0/tmp/hdfs/data需要注意jdk內容，我下載的jdk不知道爲何總少這幾個包，只能手動壓，否則導致hadoop無法啓動：
1，/usr/local/jdk1.6.0_26/jre/lib/jsse.jar /如果沒有，則用//usr/local/jdk1.6.0_26/bin/unpack200 jsse.pack jsse.jar
2，/usr/local/jdk1.6.0_26/lib/tools.jar /如果沒有，則用//usr/local/jdk1.6.0_26/bin/unpack200 tools.pack tools.jar
3，/usr/local/jdk1.6.0_26/jre/lib/rt.jar /如果沒有，則用//usr/local/jdk1.6.0_26/bin/unpack200 rt.pack rt.jar13，安裝完成：
然後在主服務器（101）
#hadoop namenode -format //格式化name節點
#/usr/local/hadoop/sbin/start-all.sh //啓動所有
#jps //查看進程
32029 SecondaryNameNode
31866 NameNode
32164 ResourceManager
32655 Jps
# hdfs dfsadmin -report //查看hdfs報考
Configured Capacity: 14184103936 (13.21 GB)
Present Capacity: 8253059072 (7.69 GB)
DFS Remaining: 8167120896 (7.61 GB)
DFS Used: 85938176 (81.96 MB)
DFS Used%: 1.04%
Under replicated blocks: 0
Blocks with corrupt replicas: 0
Missing blocks: 0
-------------------------------------------------
Datanodes available: 2 (2 total, 0 dead)
Live datanodes:
Name: 192.168.10.123:50010 (hadoop3)
Hostname: hadoop3
Decommission Status : Normal
Configured Capacity: 7092051968 (6.60 GB)
DFS Used: 24576 (24 KB)
Non DFS Used: 2965458944 (2.76 GB)
DFS Remaining: 4126568448 (3.84 GB)
DFS Used%: 0.00%
DFS Remaining%: 58.19%
Last contact: Thu Feb 20 16:58:47 CST 2014
Name: 192.168.10.110:50010 (hadoop2)
Hostname: hadoop2
Decommission Status : Normal
Configured Capacity: 7092051968 (6.60 GB)
DFS Used: 85913600 (81.93 MB)
Non DFS Used: 2965585920 (2.76 GB)
DFS Remaining: 4040552448 (3.76 GB)
DFS Used%: 1.21%
DFS Remaining%: 56.97%
Last contact: Thu Feb 20 17:00:32 CST 2014
//啓動成功之後試試
# hadoop fs -mkdir /test/
# hadoop fs -ls /
drwxr-xr-x - root supergroup 0 2014-02-20 17:13 /test
成功 ^_^了，上傳一個文件試試
#hadoop fs -put CentOS-6.5-x86_64-LiveCD.iso /test/
#hadoop fs -ls /test/
Found 1 items
-rw-r--r-- 1 root supergroup 680525824 2014-02-20 17:37 /test/CentOS-6.5-x86_64-LiveCD.iso