name : update-role-trust-policy.rst **To update the trust policy of an IAM Role to be used with Amazon EMR on EKS** This example command updates the trust policy of a role named **example_iam_role** such that it can be used with Amazon EMR on EKS with **example_namespace** namespace from an EKS cluster named **example_cluster**. * Command:: aws emr-containers update-role-trust-policy \ --cluster example_cluster \ --namespace example_namespace \ --role-name example_iam_role * Output:: If the trust policy has already been updated, then the output will be: Trust policy statement already exists for role example_iam_role. No changes were made! If the trust policy has not been updated yet, then the output will be: Successfully updated trust policy of role example_iam_role.