centos7安装hadoop伪分布式系统(2)之02安装jdk

1查看系统挂载oop df -mhadoop 2建立挂载目录变量 mkdir softsjdk 3建立软链接配置 sudo ln -s /home/hadoop/bigdater/jdk /usr/local/jdkdate 删除软链接di sudo rm -rf /usr/local/jdk环境变量 4配置环境变量sudo JAVA_HOME=/usr/local/jdk系统 CLASSPATH

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