| ### Arguments operation The name of the user operation for which to display help information user_name_list A list of principal names to act on. Supply the names as follows: · Fully qualified principal names in the form: /.../cellname/principal_name · Cell-relative principal names in the form: principal_name These names refer to a principal in the cell named in the _s(sec) convenience variable or in the default cell of the local host if the _s(sec) convenience variable is not set. Do not mix fully qualified names and cell-relative names in a list. In addition, do not use the names of registry database objects that contain principal information; in other words, do not use names that begin with /.:/sec/principal/. ###