Redhat7:System controls

Previously and Now..

The Systemctl is now used to provide all functionality that was origanly done through a number of power commands including poweroff, reboot and shutdown.

Comparison of Power Management commands
Old Command	New Command	Description
halt	systemctl halt	Halt the system
poweroff	systemctl poweroff	Powers off the system
reboot	systemctl reboot	Restarts the System
pm-suspend	systemctl suspend	Suspend the system
pm-hibernate	systemctl hibernate	Hibernate the System
pm-suspend-hybrid	systemctl hybrid-sleep	Hiberate and suspend the system