在可执行 java命令的情况下查找过程如下:
1、执行which java
[root@localhost ~]# which java /usr/bin/java
2、执行ls -lrt /usr/bin/java
[root@localhost ~]# ls -lrt /usr/bin/java lrwxrwxrwx. 1 root root 22 10月 10 08:06 /usr/bin/java -> /etc/alternatives/java
3、执行ls -lrt /etc/alternatives/java
[root@localhost ~]# ls -lrt /etc/alternatives/java lrwxrwxrwx. 1 root root 73 10月 10 08:06 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.144-0.b01.el7_4.x86_64/jre/bin/java
由上可知java的路径为: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.144-0.b01.el7_4.x86_64,进入该路径查看文件如下:
[root@localhost ~]# cd /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.144-0.b01.el7_4.x86_64 [root@localhost java-1.8.0-openjdk-1.8.0.144-0.b01.el7_4.x86_64]# ll 总用量 4 drwxr-xr-x. 2 root root 4096 10月 10 14:53 bin drwxr-xr-x. 3 root root 132 10月 10 14:53 include drwxr-xr-x. 4 root root 28 10月 10 08:03 jre drwxr-xr-x. 3 root root 144 10月 10 14:53 lib drwxr-xr-x. 2 root root 204 10月 10 14:53 tapset [root@localhost java-1.8.0-openjdk-1.8.0.144-0.b01.el7_4.x86_64]#
