1.配置hadoop的环境变量bash_profile,配置内容如下
PATH=$PATH:$HOME/bin
export PATH
export JAVA_HOME=/usr/java/jdk1.7.0_79
export PATH=$PATH:$JAVA_HOME/bin
export HADOOP_HOME=/home/hadoop-2.5.1
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
2.通过如下命令将配置文件生效
source ~/.bash_profile