I have turned off or disabled the NetworkManager service in CentOS 7 but now I want to connect internet through wireless. So, please tell me how to connect wireless network with Network Manager service disabled?
Enable and configure the
systemd-networkd service on your system. There is an example here ; then connect to your wifi using
ifconfig to manage to interface from the command line. If you want it to persist between boots then edit
You can verify if an interface is managed or not using
nmcli dev status.
When the NetworkManager is disabled all interfaces should be unmanaged. It is also possible to keep NetworkManager running - and then instruct it to only manage specific interfaces.
Apart from bringing the interface up - you probably need wpasupplicant too.
This is all answered in How to bring up a wi-fi interface from a command line