请问 hadoop 组件中的 hadoop 是安装在 /opt 下还是 /usr/local 下？

hadoop version返回了This command was run using /usr/local/hadoop-2.7.3/share/hadoop/common/hadoop-common-2.7.3.jar，which hadoop返回的是/opt/hadoop-2.7.3/bin/hadoop，那么修改配置文件应该是修改/usr/local/hadoop-2.7.3/etc/hadoop下面的还是/opt/hadoop-2.7.3/etc/hadoop下面的？