RBAC in Linux
 

Hi Everyone.

kindly give some inputs about the RBAC implementation in Linux.
Any links/docs are welcome.

thanks in advance

is it a role based access security on selinux on linux?

Role based Access control in<<RedHat enterprise >> Red Hat 4.4.5-6..Linux version 2.6.32-220.el6.x86_64

Alternately i achieved the task by disabling the telnet and ssh login for root and now the users can login then su to root.
Presently each user has the facility to "su" to root and login(if password is known).
Is it possible to su - root only to some users who are allowed to do so? kindly suggest
thanks in advance

If all users can do "su", that means they have root password. So simply change the root password and provide it to only those who need it.

Alternatively, you can add needful users to /etc/sudoers to allow them to use sudo, instead of direct "su", and have some root privileges.