To open the user interface

$ nmtui

To display a list of available connections, with the option to activate or deactivate 

$ nmtui connect

To set the system hostname

$ nmtui <hostname>

To edit/add/delete a given network

$ nmtui edit name

or

$ nmtui edit id

To connect to a given network

$ nmtui connect name

$ nmtui connect uuid

$ nmtui connect device

$ nmtui connect SSID

regards,

T.Dhanasekar