在ifconfig wlan0 up 后输出
ifconfig wlan0 up
usb 1-1: firmware: requesting zd1211/zd1211_ub
usb 1-1: Could not load firmware file zd1211/zd1211_ub. Error number -2
zd1211rw 1-1:1.0: couldn't load firmware. Error number -2
ifconfig: SIOCSIFFLAGS: No such file or directory