Install the wireless network card driver

Conventional methods ： https://blog.csdn.net/weixin_34233618/article/details/88011110

• If there is a problem with the above installation , Look down again

This system uses Ubuntu20.04, Tengda used U12 wireless network adapter

#  see kernel edition , The two methods 
cat /proc/version
uname -a
# Linux 21 5.15.0-41-generic

It is found that the system is kernel5 edition , Because the official network card driver is 17 Year of , I won't support it kernel5, So go to github Pulled a new version .

#  First create a folder 
mkdir 8821au
cd 8821au
git clone https://github.com/aircrack-ng/rtl8812au

Be careful ： Before compiling , First determine whether there is a compilation environment .
Ubuntu By default , It didn't provide C/C++ Compiler environment for , Therefore, manual installation is also required . But if installed separately gcc as well as g++ More trouble , Fortunately, ,Ubuntu Provides a build-essential software package .

apt-get install build-essential
cd rtl8821au
make dkms_install

After compilation , If no error is reported , Restart to see wifi Status quo .