I like to disable wlan on yun and only work with wired network
i have connected yun with cable and it seems both wlan and lan are active
is it a god way in lucy network
interface-lan
bring up on boot to deactivate
Command line instructions from Federico here:
http://forum.arduino.cc/index.php?PHPSESSID=r51m0hbi4ol2ji6gsio3e5lbk3&topic=188821.msg1399080#msg1399080
You should be able to accomplish the same thing by disabling the radio on Network->Wifi and putting a # in front of wifi-live-or-reset in the Local Startup box at the bottom of System->Startup if you want to use Luci