Install the NIC Driver in Ubuntu. 1. Use lsusb on the terminal to check that the chip of my wireless Nic is 5370 Ralink. Related linux drivers can be in http://www.mediatek.com/_en/07_downloads/01_windows.php? Download sn = 501. 2. decompress the downloaded compressed package. Here, I put the decompressed folder in the user directory and name it STA. The path is/home/lucifer/STA. 3. Enter the STA folder and modify the OS/linux/config. mk file to enable HAS_WPA_SUPPLICANT and HAS_NATIVE_WPA_SUPPLICANT_SUPPORT. For details, see the following code: (change the corresponding n to y) # Support Wpa_SupplicantHAS_WPA_SUPPLICANT = y # Support Native Wpa_Supplicant for Network MagangerHAS_NATIVE_WPA_SUPPLICANT_SUPPORT = y 4. use the terminal to enter/home/lucifer/STA. and run the following command. To obtain the root permission, sudo su needs to enter the current user's password makemake installmodprobe rt5370sta. 5. Add the NIC to/etc/modules (no operation is performed and no exception is found .) Code: echo rt5370sta>/etc/modules