centos7 jdk

查看已经自带的jdk: rpm -qa | grep jdk

卸载 sudo yum remove XXX

 

1.下载 jdk-8u101-linux-x64.rpm

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

 

 

2.上传到linux服务器

scp /Users/yintingting/Downloads/jdk-8u181-linux-x64.rpm root@192.168.156.140:/root/

3. 解压安装

sudo chmod 777 jdk-6u32-linux-i586-rpm

rpm -ivh jdk-6u32-linux-i586-rpm

默认安装到/usr/java

4.设置环境变量

#vi /etc/profile

在最后面加入

#set java environment

JAVA_HOME=/usr/java/jdk1.8.0_101

CLASSPATH=.:$JAVA_HOME/lib/tools.jar

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME CLASSPATH PATH

启用该设置

. /etc/profile (点后边有个空格)

5.在终端使用echo命令检查环境变量设置情况

#echo ＄JAVA_HOME

#echo ＄CLASSPATH

#echo ＄PATH

6.检查JDK是否安装成功

#java -version

 

把linux的rpm文件删掉

rm jdk-8u181-linux-x64.rpm