要修改4个文件
1: vim hadoop-env.sh 第九行
2: vim core-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop0:9000</value>
<description>change your own hostname</description>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/usr/local/hadoop/tmp</value>
</property>
</configuration>
3: hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
</configuration>
4: mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>hadoop0:9001</value>
<description>change your own hostname</description>
</property>
</configuration>
