https://www.cnblogs.com/zishengY/p/6819160.html?utm_source=itdadao&utm_medium=referral
配置hadoop环境
export HADOOP=/usr/local/src/hadoop-2.6.5
export JAVA_HOME=/usr/local/java/jdk1.8.0_171
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$HADOOP/bin