linux安装JDK1.8并配置环境变量

[root@k8s-master2 bin]# JDK全版本下载：https://www.oracle.com/technetwork/java/javase/archive-139210.html
[root@k8s-master2 bin]# rz
[root@k8s-master2 bin]# mkdir /usr/java
[root@k8s-master2 bin]# tar zxvf jdk-8u91-linux-x64.tar.gz -C /usr/java/
[root@k8s-master2 java]# mv jdk1.8.0_91/ jdk1.8.0
[root@k8s-master2 java]# vim /etc/profile
export JAVA_HOME=/usr/java/jdk1.8.0
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
export PATH=$PATH:${JAVA_PATH}                                                                                                           
[root@k8s-master2 java]# source /etc/profile
[root@k8s-master2 java]# java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)