Question: nmcli how to connect to wifi?
Answer: $ nmcli d DEVICE TYPE STATE CONNECTION ... ... 
$ nmcli r wifi on.
$ nmcli d wifi list * SSID MODE CHAN RATE SIGNAL BARS SECURITY ... ... 
$ nmcli d wifi connect my_wifi password <password>
$ nmcli c add type wifi con-name <name> ifname wlan0 ssid <ssid> $ nmcli c modify <name> wifi-sec.key-mgmt wpa-psk wifi-sec.psk <password>