/etc/profile里添加的内容：

export JAVA_HOME=/jdk

export HADOOP_HOME=/hadoop

export SCALA_HOME=/scala

export SPARK_HOME=/spark

export PATH=$PATH:$JAVA_HOME/bin

export PATH=$PATH:$SPARK_HOME/bin

export PATH=$PATH:$HADOOP_HOME/bin

export PATH=$PATH:$SCALA_HOME/bin

export PATH=$PATH:$SPARK_HOME/sbin

export CLASSPATH=.:$JAVA_HOME/lib

/jdk为jdk的安装目录，/hadoop为hadoop的安装目录，/scala为scala的安装目录，/spark为spark的安装目录。

hadoop里需要添加的JAVA_HOME

hadoop文件夹下的/etc/hadoop/hadoop-env.sh

export JAVA_HOME=/jdk

spark里需要添加的JAVA_HOME

spark文件夹下的sbin/spark-config.sh

export JAVA_HOME=/jdk

spark文件夹下的conf/spark-env.sh

export JAVA_HOME=/jdk

export SCALA_HOME=/scala

export HADOOP_HOME=/hadoop

标签：JAVA,SCALA,HADOOP,hadoop,export,HOME,PATH,spark

来源： https://blog.csdn.net/Python_Billy/article/details/104790131