If you are using systemd, systemctl will be the command line tool, you need.
Status of a unit
systemctl status <unit>
Control units
systemctl [start|stop|reload|restart] <unit>
List units
systemctl list-units [--all]
List unit files
systemctl list-unit-files
Show Content of a unit file
systemctl cat httpd.service
Get / set default runlevel
systemctl [get-default|set-default <target>]
Reach a target
systemctl isolate <target>