AWS的redhat7中安装jdk8

下载jdk8

wget https://download.oracle.com/otn-pub/java/jdk/8u191-b12/2787e4a523244c269598db4e85c51e0c/jdk-8u191-linux-x64.tar.gz?authparam=1545702611_985353507b7b4664bfce283ab5218681

tar zxvf jdk-8u191-linux-x64.tar.gz 

cd jdk1.8.0_191/

vim /etc/profile在结尾加入：

export java_home=/usr/java
export classpath=.:$java_home/jre/lib/rt.jar:$java_home/lib/dt.jar:$java_home/lib/tools.jar
export path=$path:$java_home/bin 

 source /etc/profile

完成，运行正常：java -version