How to connect to wireless network with NetworkManager

1. Activate the status of Wi-Fi in NetworkManager

$ nmcli nm wifi on

2. Creates a new connection named "myname" and then connects it to "mySSID" SSID using "mypassword" password.

$ nmcli dev wifi con mySSID password mypassword name myname

3. connects the Wi‐Fi connection with the name "myname"

$ nmcli con up id myname

Other information also in the man page of nmcli