在Jetson Nano上直接编译会失败，因为在系统中还做了一些修改。可以clone后，用 sudo make install 直接安装使用。

我刚买了Tenda U9，算比较便宜，在WIN系统上正常，速度还可以。但在JETSON NANO上没有驱动可用，驱动是为x86_64设计的。 直接编译不成功，我用非常笨拙的方法修改了下，编译成功，使用正常。 请参考 https://github.com/MingxuZhang/rtl8821cu 里的安装方法。重点是：

Plug your USB-wifi-adapter into your PC If wifi can be detected, congratulations. If not, maybe you need to switch your device usb mode by the following steps in terminal:

find your usb-wifi-adapter device ID, like "0bda:1a2b", by type: lsusb

switch the mode by type: (the device ID must be yours.) sudo usb_modeswitch -KW -v 0bda -p 1a2b It should work.

使用时要切换一下网卡的模式，才可工作。实际上可以用脚本，检测到此设备插入时，自动执行usb_modeswitch。

以下为原信息。

Realtek RTL8811CU/RTL8821CU USB wifi adapter driver version 5.4.1 for Linux 4.4.x up to 5.1.x

Before build this driver make sure make, gcc, linux-header and git have been installed.

First, clone this repository

mkdir -p ~/build
cd ~/build
git clone https://github.com/brektrou/rtl8821CU.git

Build and install with DKMS

DKMS is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the dkms package.

Debian/Ubuntu:

sudo apt-get install dkms

Arch Linux/Manjaro:

sudo pacman -S dkms

To make use of the DKMS feature with this project, just run:

./dkms-install.sh

If you later on want to remove it, run:

./dkms-remove.sh

Build and install without DKMS

Use following commands:

cd ~/build/rtl8821CU
make
sudo make install

If you later on want to remove it, do the following:

cd ~/build/rtl8821CU
sudo make uninstall

Checking installed driver

If you successfully install the driver, the driver is installed on /lib/modules/<linux version>/kernel/drivers/net/wireless/realtek/rtl8821cu. Check the driver with the ls command:

ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu

Make sure 8821cu.ko file present on that directory

Check with DKMS (if installing via DKMS):

sudo dkms status