In several chapters of this book,1 I discuss system monitors and some methods of running them on your machine at all times. By automatically starting a process at the system level you can accomplish this task in multiple ways without user interaction. There is
cron, the system scheduler, as well as
at, another scheduling utility. You also can start a process with an
rc (run control) startup script, traditionally located in the
/etc/rc directory, which is processed automatically at boot time.
Here I want to discuss the
init process. The
init man page states that it is "the parent of all processes."
Init runs the scripts that, in turn, run the startup scripts living in the
/etc/rc directories.2 It also ...