安装JDK
将jdk-8u191-linux-x64.rpm 放到soft目录下，然后执行rpm -ivh命令开始安装，安装完毕后去到/usr/java 目录看安装完成的java，rpm -qa|grep jdk查看是否安装JDK
[root@zyz soft]# rpm -ivh jdk-8u191-linux-x64.rpm warning: jdk-8u191-linux-x64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY Preparing... ################################# [100%] Updating / installing... 1:jdk1.8-2000:1.8.0_191-fcs ################################# [100%] Unpacking JAR files... tools.jar... plugin.jar... javaws.jar... deploy.jar... rt.jar... jsse.jar... charsets.jar... localedata.jar... [root@zyz soft]# ls /usr bin etc games include java lib lib64 libexec local sbin share src tmp [root@zyz soft]# cd /usr/java [root@zyz java]# ls default jdk1.8.0_191-amd64 latest [root@zyz java]# rpm -qa|grep jdk jdk1.8-1.8.0_191-fcs.x86_64
配置环境变量
vi /etc/profile修改环境变量
vi /etc/profile
粘贴如下:
JAVA_HOME=/usr/java/jdk1.8.0_191-amd64 JRE_HOME=/usr/java/jdk1.8.0_191-amd64/jre CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin export JAVA_HOME JRE_HOME CLASS_PATH PATH
退出编辑器，执行source 生效环境变量，echo输出定义变量验证修改生效
[root@zyz java]# source /etc/profile [root@zyz java]# echo $JAVA_HOME /usr/java/jdk1.8.0_191-amd64
