Determine the current runlevel the system is configured to boot to
# systemctl get-default
The same as runlevel 3 in CentOS 6
multi-user.target
The same as runlevel 5 in CentOS 6
graphical.target
Change default runlevel permanently
Boots CLI as default
# systemctl set-default multi-user.target
Boots GUI as default
# systemctl set-default graphical.target
Activate a run level without rebooting
Start the GUI
# systemctl isolate graphical.target
Start the CLI
# systemctl isolate multi-user.target