What does update-RC D do?
DESCRIPTION. update-rc. d updates the System V style init script links /etc/rcrunlevel. d/NNname whose target is the script /etc/init.
How do I remove a service from RC D?
Use the remove keyword with update-rc. d to remove the service start up command for an application. You will need to use the -f switch if the applications /etc/init. d start up file exists.