allow-hotplug wpl3s0 
# allow-hotplug XinterfaceX: Auto activation au démarage de l'interface
iface wpl3s0 inet dhcp 
# iface XinterfaceX inet dhcp/static: partie de configuration en dhcp 
	wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf 
       # Wifi: wpa-conf [chemin]: insertion des conf wpa