Upstart and SysVinit

/etc/init is where the upstart init configs live. While they are not scripts themselves, they essentially execute whatever is required to replace sysvinit scripts.

Short story: /etc/init/name.conf will get picked up. It will be used automatically as their 'start on' stanzas control and/or manually by you. And it will put a log in /var/log/upstart/name.log

In Red Hat Enterprise Linux 6, init from the sysvinit package has been replaced with Upstart, an event-based init system.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/migration_planning_guide/sect-networking-upstart

/etc/init.d is where all the traditional sysvinit scripts and the backward compatible scripts for upstart live.

https://www.computernetworkingnotes.com/linux-tutorials/differences-between-sysvinit-upstart-and-systemd.html

https://helpful.knobs-dials.com/index.php/Upstart_notes http://v0clinux.blogspot.com/2017/02/list-services-on-startup-initctl-list.html