11111111

参考步骤
1. 使用vim编辑器打开/usr/local/hadoop/etc/hadoop/core-site.xml文件，它的初始内容如下：
 <configuration>
 </configuration>
 修改以后，core-site.xml文件的内容如下：
 <configuration>
    <property>
         <name>hadoop.tmp.dir</name>
         <value>file:/usr/local/hadoop/tmp</value>
         <description>Abase for other temporary directories.</description>
     </property>
     <property>
         <name>fs.defaultFS</name>
         <value>hdfs://localhost:9000
     </property>
 </configuration>

 2. 同样，需要修改配置文件hdfs-site.xml，修改后的内容如下：
 <configuration>
     <property>
         <name>dfs.replication</name>
         <value>1</value>
     </property>
     <property>
         <name>dfs.namenode.name.dir</name>
         <value>file:/usr/local/hadoop/tmp/dfs/name</value>
     </property>
     <property>
         <name>dfs.datanode.data.dir</name>
         <value>file:/usr/local/hadoop/tmp/dfs/data</value>
     </property>
 </configuration>

export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_162
export JRE_HOME=$JAV{A}_{H}OME/jreexportCLASSPATH=.:${JAVA_HOME}/lib:$JR{E}_{H}OME/libexportPATH=${JAVA_HOME}/bin:$PATH