This package contains helper tools that are necessary for switching between
 the various init systems that Debian contains (e. g. sysvinit or
 systemd). An example is deb-systemd-helper, a script that enables systemd unit
 files without depending on a running systemd.
 .
 It also includes the "service", "invoke-rc.d", and "update-rc.d" scripts which
 provide an abstraction for enabling, disabling, starting, and stopping
 services for all supported Debian init systems as specified by the policy.
 .
 While this package is maintained by pkg-systemd-maintainers, it is NOT
 specific to systemd at all. Maintainers of other init systems are welcome to
 include their helpers in this package.