[Ubuntu] invoke-rc.d

invoke-rc.d is a generic interface to execute System V style init script /etc/init.d/name actions, obeying runlevel constraints as well as any local policies set by the system administrator.
All access to the init scripts by Debian packages' maintainer scripts should be done through invoke-rc.d.
This manpage documents only the usage and behavior of invoke-rc.d. For a discussion of the System V style init script arrangements please see init(8) and the dpkg Programmers' Manual. More information on invoke-rc.d can be found in the section on runlevels and init.d scripts of the Debian Policy Manual.
-- Man page of invoke-rc.d(8)