Runlevel
# /sbin/runlevel
# cat /etc/inittab | grep :initdefault:
id:5:initdefault:
To switch runlevels, you can run the following, replace RUNLEVEL with the appropriate number (3, 5, etc.):
# /sbin/init RUNLEVEL
Enable/Disabling Services
# /sbin/chkconfig --list
# /sbin/chkconfig --level 35 crond on
Controlling Services
# /sbin/service --status-all
# /sbin/service crond status
crond (pid 1604) is running...
[root@charon ~]# service crond
Usage: /etc/init.d/crond {start|stop|status|reload|restart|condrestart}
[root@charon ~]# service crond stop
Stopping crond: [ OK ]
[root@charon ~]# service crond start
Starting crond: [ OK ]
[root@charon ~]# service crond restart
Stopping crond: [ OK ]
Starting crond: [ OK ]
# /etc/init.d/crond status
http://www.mjmwired.net/resources/mjm-fedora-manage-services.html