Linux版本:Redhat 7.6 x64 # 一、下载JDK安装包 从oracle官网下载JDK:[Java SE Development Kit 8 - Downloads](https://www.oracle.com/cn/java/technologies/javase/javase-jdk8-downloads.html) 选择合适的版本,本文选择 jdk-8u271-linux-x64.rpm 。 # 二、安装 执行rpm安装: ```bash [root@bogon software]# rpm -i ./jdk-8u271-linux-x64.rpm 警告:./jdk-8u271-linux-x64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID ec551f03: NOKEY Unpacking JAR files... tools.jar... plugin.jar... javaws.jar... deploy.jar... rt.jar... jsse.jar... charsets.jar... localedata.jar... ``` # 三、配置环境变量 配置环境: ```bash [root@bogon software]# vi /etc/profile # Java: export JAVA_HOME=/usr/java/jdk1.8.0_271-amd64/ export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar ``` 重新登录,校验环境变量是否生效: ```bash [root@bogon ~]# which javaws /usr/java/jdk1.8.0_271-amd64/bin/javaws ```