jdk安装

wget https://mirrors.huaweicloud.com/java/jdk/8u202-b08/jdk-8u202-linux-x64.tar.gz

#!/bin/bash
#https://mirrors.huaweicloud.com/java/jdk/8u202-b08/
tar xf jdk-8u202-linux-x64.tar.gz -C /usr/local
export JAVA_HOME="/usr/local/jdk1.8.0_202"
if ! grep "JAVA_HOME=/usr/local/jdk1.8.0_202" /etc/profile
then
    echo "JAVA_HOME=/usr/local/jdk1.8.0_202" | sudo tee -a /etc/profile
    echo "export JAVA_HOME" | sudo tee -a /etc/profile
    echo "PATH=$PATH:$JAVA_HOME/bin" | sudo tee -a /etc/profile
    echo "export PATH" | sudo tee -a /etc/environment
    echo "CLASSPATH=.:$JAVA_HOME/lib" | sudo tee -a /etc/profile
    echo "export CLASSPATH" | sudo tee -a /etc/profile
fi

#update environment
source /etc/profile
echo "jdk is installed !"

测试

[root@localhost ~]# java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)