Linux中使用shell脚本安装openjdk并配置环境变量

#!/bin/bash
#安装openjdk
echo `yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel.x86_64`

#找到jdk安装路径并赋值给变量
a=`ls -lrt \`which java\` | awk '{print $11}'`
b=`ls -lrt $a | awk '{print $11}' | awk -v FS="/" -v OFS="/" 'NF=5'`

#将环境变量写入
echo "export JAVA_HOME=$b" >> /etc/profile
echo 'export PATH=$PATH:$JAVA_HOME/bin' >> /etc/profile