进入/usr
文件夹,创建文件java
# cd /usr
# mkdir java
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "https://download.oracle.com/otn-pub/java/jdk/8u191-b12/2787e4a523244c269598db4e85c51e0c/jdk-8u191-linux-x64.tar.gz"
# tar -zxvf jdk-8u191-linux-x64.tar.gz
# vi /etc/profile
输入i进入编辑模式,输入shift+Q后在输入wq保存
JAVA_HOME=/usr/java/jdk1.8.0_191
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
执行命令,使配置文件生效
# source /etc/profile
查看
# java -version
结果如下图所示: