Liunx安装JDK

[root@localhost local]# tar -zxvf jdk-8u251-linux-x64.tar.gz

[root@localhost local]# vim /etc/profile
export JAVA_HOME=/usr/local/jdk1.8.0_181  #jdk安装目录
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
export PATH=$PATH:${JAVA_PATH}
## 设备生效
[root@localhost local]# source /etc/profile