1:echo $JAVA_HOME
使用$JAVA_HOME的话能定位JDK的安装路径的前提是配置了环境变量$JAVA_HOME,否则如下所示,根本定位不到JDK的安装路径
[[email protected] ~]# java -version
java version "1.7.0_65"
OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
[[email protected] ~]# echo $JAVA_HOME
2:which java
首先要申明一下which java是定位不到安装路径的。which java定位到的是java程序的执行路径。网上的资料都是人云亦云,完全不去思考。那么怎么定位到java的安装路径呢?下面我们来看看例子吧,如下所示:
[[email protected] ~]# java -version java version "1.7.0_65" OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17) OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode) [[email protected] ~]# which java /usr/bin/java [[email protected] ~]#
ls -lrt /usr/bin/
java lrwxrwxrwx. 1 root root 22 Aug 17 15:12 /usr/bin/java -> /etc/alternatives/java [[email protected] ~]#
ls -lrt /etc/alternatives/
java lrwxrwxrwx. 1 root root 46 Aug 17 15:12 /etc/alternatives/java -> /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java [[email protected] ~]# [[email protected] ~]# cd /usr/lib/jvm [[email protected] jvm]# ls java-1.6.0-openjdk-1.6.0.0.x86_64 java-1.7.0-openjdk-1.7.0.65.x86_64 jre jre-1.6.0 jre-1.6.0-openjdk.x86_64 jre-1.7.0 jre-1.7.0-openjdk.x86_64 jre-openjdk [[email protected] jvm]#
whereis java 也是如此,它本身不能定位到安装路径。可以通过上面例子去定位安装路径
资源地址:http://www.cnblogs.com/kerrycode/
时间: 2024-10-29 04:58:07