What we have learned
- For user confirmation on each service, create the file /tmp/confirm?
- To stop, start, restart or see status on a service, type the name of the associated subsystem script file, in "/etc/rc.d/init.d" with start, stop, restart, or status afterward on the command line.
- Find a way of determining links to files.
- The "/etc/rc.d/rcn.d" subdirectories contain kill and start files for services to be run in the runlevel n and services not to be run.
To change the system runlevel:
A privileged user must invoke the "telinit" program.
When the system runlevel is changed, any running processes that are not specified for the new runlevel are killed, first with SIGTERM, then with SIGKILL.