Pour mémoire. Quelques commandes :
# lsusb
# lspci -k -nn | grep -A 3 -i net
# sudo lshw -C network
# lsmod | sort
# iwconfig
# ifconfig -a
# sudo iwlist scan
# uname -r -m
# cat /etc/network/interfaces
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
# nm-tool (obsolète)
# nmcli dev wifi
# nmcli connection
# sudo rfkill list
# sudo rfkill unblock all

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Cher Google ...

"If you connect to a WiFi hotspot whilst out and about, sometimes you have to login or accept Terms and Conditions. To do that the 'captive portal' has to intercept one of your requests and inject the login page for the WiFi. This usually results in a big, red warning from your browser which you should never click through! Instead, open a new tab in your browser and come here!"