Useful for privacy and time-capped WiFi connection at airports. $ ifconfig -a wlan0 | grep HWaddr wlan0 Link encap:Ethernet HWaddr 00:16:2B:8D:A2:6C $ sudo ifconfig wlan0 down $ sudo ifconfig wlan0 hw ether 00:16:2B:8D:A2:7C $ sudo ifconfig wlan0 up $ ifconfig -a wlan0 | grep HWaddr wlan0 ... »