# insmod mt7601Usta.ko
rtusb init rt2870 --->
usbcore: registered new interface driver rt2870
# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
ra0 Ralink STA ESSID:"11n-AP" Nickname:"MT7601STA"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Bit Rate:1 Mb/s
RTS thr:off Fragment thr:off
Encryption key:off
Link Quality=10/100 Signal level:0 dBm Noise level:0 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
# ifconfig ra0 up
unlink cmd rsp urb
ifconfig: SIOCSIFFLAGS: Operation not permitted
原因：/etc/Wireless/RT2870STA/RT2870STA.dat 该文件找不到导致的。
解决：将驱动对应的dat文件拷贝对应目录，就没问题了。
$cp RT2870STA.dat /etc/Wireless/RT2870STA/RT2870STA.dat