Devuan GNU+Linux is a free software operating system for your
computer. Free software means you are free to use, copy
and distribute, study, change the software, and share your
modifications with the community.
software freedom, your way
apt install init-system-helpers
admin : important
helper tools for all init systems
This package contains helper tools that are necessary for switching between
the various init systems that Devuan contains (e.g. sysvinit, upstart).
Maintainers of other init systems are welcome to include their helpers in this package, provided it doesn't try to take over the world.