# wpa_supplicant -B -i wlan0 -c /data/conf/wpa-wpa2.conf
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL control device
nl80211: Could not re-add multicast membership for vendor events: -2 (No such file or directory)
ctrl_iface exists and seems to be in use - cannot override it
Delete '/var/run/wpa_supplicant/wlan0' manually if it is not used anymore
Failed to initialize control interface '/var/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.
nl80211: deinit ifname=wlan0 disabled_11b_rates=0