In order to stop or disable these unnecessary services or packages from the Ubuntu distributions, which of the following commands should Cedric employ?

Cedric, who is a software support executive working for Panacx Tech. Inc., was asked to install Ubuntu operating system in the computers present in the organization. After installing the OS, he came to know that there are many unnecessary services and packages in the OS that were automatically installed without his knowledge. Since these services or packages can be potentially harmful and can create various security threats to the host machine, he was asked to disable all the unwanted services.

In order to stop or disable these unnecessary services or packages from the Ubuntu distributions, which of the following commands should Cedric employ?
A . # update-rc.d -f [service name] remove
B . # chkconfig [service name] Cdel
C . # chkconfig [service name] off
D . # service [service name] stop

Answer: C