For the Red Hat-based systems family, the command differs, but you get an additional tool for managing system startup. Adding the service can be done via the following command:
[[email protected] ~]# chkconfig nginx on
Once that is done, you can then verify the runlevels for the service:
[[email protected] ~]# chkconfig --list nginx
Nginx 0:off 1:off 2:on 3:off 4:on 5:on 6:off
Another tool will be useful to you for managing system services, namely, ntsysv. It lists all services scheduled to be executed on system startup and allows you to enable or disable them at will:
ntsysv requires root privileges to be executed. Prior to using ntsysv, you must first run the chkconfig nginx on command, otherwise nginx will not appear in the list of services.