Guide to connect to a wifi for terminal

To connect a wifi first Up the wlan0:

$ sudo ifconfig wlan0 up  

list of wifi in the area:

$ sudo iwlist wlan0 scan

Check of ESSID of the red to want connect

And now connect to wifi:

$ sudo nmcli d wifi connect "ESSID" password "the-password" iface wlan0

A real case:

$ sudo nmcli d wifi connect "Generico" password "12345678910" iface wlan0