Centos 7 查看使用YUM 安装的JDK路径并配置JAVA_HOME

1、查找路径

　　

[root@master01 jre]# which java
/bin/java
[root@master01 jre]# ls -l /bin/java
lrwxrwxrwx. 1 root root 22 Mar 22 01:01 /bin/java -> /etc/alternatives/java
[root@master01 jre]# ls -l /etc/alternatives/java
lrwxrwxrwx. 1 root root 73 Mar 22 01:01 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre/bin/java

　2、配置JAVE_HOME

　　

vi /etc/profile

　　插入：

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre
export PATH=$PATH:$JAVA_HOME/bin

　　3、使配置生效

　　

source /etc/profile