When building a Hadoop cluster, it is recommended to use ordinary user management . Using the root user for management may bring some security risks, because the root user has the highest authority. If hacked or misoperated, the entire system may crash or data may be lost.
Using ordinary users to manage Hadoop clusters can effectively reduce risks and better control permissions. When installing Hadoop, you can create a dedicated Hadoop user and add it to the Hadoop user group. Then, assign ownership and permissions of the Hadoop installation directory and data directory to the Hadoop user and Hadoop user group. In this way, only the Hadoop user and Hadoop user group can access and modify Hadoop-related files and directories, and other users have no permissions.
In short, using ordinary users to manage Hadoop clusters is a more secure and controllable way.