1 组件安装路径: /opt/cloudera/parcels/CDH/lib
hadoop配置文件路径:/opt/cloudera/parcels/CDH/lib/hadoop/etc/hadoop (hadoop软链接 -->/etc/hadoop/conf)
hive配置文件路径:/opt/cloudera/parcels/CDH/lib/hive/conf (conf软链接 -->/etc/hive/conf)
2 组件配置路径: /etc/组件名/conf 步骤1 通过软链接指过来
3 组件命令行直接输入可以运行。如hadoop hive命令
PATH: /bin/hadoop /usr/bin/hadoop
上述2者都是 软链接 指向 /etc/alternatives/hadoop ,这里又软链接指向 /opt/cloudera/parcels/CDH/bin/hadoop