I remember the sysadmin who kept INSISTING to get something working at my work I had to do some complicating thing with my init.d. I kept insisting I HAD NO init.d because my system was NOT Red Hat-based, it was Slackware.
We had been mostly a Slackware shop as far as Linux went, before folk like him showed up.
I had an rc.d. Once I ignored him, it turned out I merely had to make a minor and obvious change to the multiuser-mode startup script.