linux中java默认的安装位置

查看版本信息:
[root@lb01 ~]# java -version
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

查看环境变量:

[root@lb01 ~]# echo $JAVA_HOME
(为空)

查找java:

[root@lb01 ~]# which java
/usr/bin/java
[root@lb01 ~]# ls -lrt /usr/bin/java
lrwxrwxrwx. 1 root root 22 Oct 25  2019 /usr/bin/java -> /etc/alternatives/java

查看超链接可知道环境变量信息:

[root@lb01 ~]# ls -lrt /etc/alternatives/java
lrwxrwxrwx. 1 root root 71 Oct 25  2019 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86_64/jre/bin/java

所以java环境变量是:

/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86_64/

 

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