Role-based access control (RBAC) is an amazing feature, which also exists on Oracle Solaris 11 (its origin was in Oracle Solaris 8), that primarily makes it possible to restrict the granted privileges to a normal user for executing tasks. Putting this another way, RBAC makes it feasible to delegate only the necessary privileges for a regular user to be able to accomplish administrative tasks in a way similar to that of a sudo program. When compared with a sudo program, the main difference is the fact that RBAC is completely integrated in the operating system, and it is used during the user logon process to Oracle Solaris 11. Moreover, RBAC offers a more granular access to privileges than sudo does, and integration with another great feature from Oracle Solaris 11 named least privilege, which is used to cut out unnecessary privileges from processes and programs, allows you to reduce the attack surface of a hacker.