First, find renderings
Second, look for the steps
1, first verify that in accordance with the JDK
the Java -version
[root@iZ2ze3zda3caeyx6pn7c5zZ base-eureka]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
2, and then find the location of the java command
which java
[root@iZ2ze3zda3caeyx6pn7c5zZ base-eureka]# which java /usr/bin/java
3, find the java command position for the soft address
ls -l /usr/bin/java
[root@iZ2ze3zda3caeyx6pn7c5zZ base-eureka]# ls -l /usr/bin/java lrwxrwxrwx 1 root root 22 Jun 18 15:45 /usr/bin/java -> /etc/alternatives/java
4. Finally find the JDK installation directory by soft address
ls -l /etc/alternatives/java
[root@iZ2ze3zda3caeyx6pn7c5zZ base-eureka]# ls -l /etc/alternatives/java lrwxrwxrwx 1 root root 73 Jun 18 15:45 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.212.b04-0.el7_6.x86_64/jre/bin/java