FreeBSD-init

The FreeBSD init system is called rc.

Documentation

official tutorial	https://docs.freebsd.org/en/articles/rc-scripting/#rcng-dummy
man rc.subr	https://www.freebsd.org/cgi/man.cgi?query=rc.subr
man rc	https://www.freebsd.org/cgi/man.cgi?query=rc
man rcorder	https://www.freebsd.org/cgi/man.cgi?query=rcorder

Locations

/etc/rc.d/*	system rc scripts
/usr/local/etc/rc.d/*	user rc scripts
/etc/rc.subr	available rc script methods

Notes

freebsd rc usage

freebsd rc syntax

freebsd rc troubleshooting