To assign a role to a user, an administrator performs the following tasks:
Adds a user to the cluster, if the cluster is not running in secure mode.
Assigns a role to the user.
Assigns the user a set of objects appropriate for the role. For clusters that run in secure mode, you also can add a role to an operating system user group.
For example, an administrator may assign a user the group administrator role for specific service groups. Now, the user has privileges to perform operations on the specific service groups.
You can manage users and their privileges from the command line or from the graphical user interface.