init is the parent of all processes on the system, it is executed by
the kernel and is responsible for starting all other processes; it is
the parent of all processes whose natural parents have died and it is
responsible for reaping those when they die.
Processes managed by init are known as jobs and are defined by files in
the /etc/init directory. See init(5) for more details on configuring
init(8) is an event-based init daemon. This means that jobs will be
automatically started and stopped by changes that occur to the system
state, including as a result of jobs starting and stopping.
This is different to dependency-based init daemons which start a speci-
fied set of goal jobs, and resolve the order in which they should be
started and other jobs required by iterating their dependencies.
For more information on starting and stopping jobs, as well as emitting
events that will automatically start and stop jobs, see the manual page
for the initctl(8) tool.
The primary event is the startup(7) event, emitted when the daemon has
finished loading its configuration. Other useful events are the start-
ing(7), started(7), stopping(7) and stopped(7) events emitted as jobs
System V compatibility
The Upstart init(8) daemon does not keep track of runlevels itself,
instead they are implemented entirely by its userspace tools. The
event emitted to signify a change of runlevel is the runlevel(7) event.
For more information see its manual page.
Options are passed to init(8) by placing them on the kernel command-
Outputs verbose messages about job state changes and event emis-
sions to the system console or log, useful for debugging boot.
init is not normally executed by a user process, and expects to have a
process id of 1. If this is not the case, it will actually execute
telinit(8) and pass all arguments to that. See that manual page for
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
init(5) initctl(8) telinit(8) runlevel(7) startup(7) starting(7)
started(7) stopping(7) stopped(7)
Upstart 2010-02-04 init(8)
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