Installing WiFi Adapter Driver in Linux Mint 19

Guys I kindly follow the instructions : (This method works on all distro... just choose the package manager correctly)

1. sudo apt-get update && sudo apt-get upgrade and then sudo apt-get install linux-headers-$(uname -r) (This part may vary from distro to distro)
2. Reboot your pc
3. Goto this link and download the New_Rtl_Wifi folder https://drive.google.com/drive/folders/14lxI5D-EErb5bT9MjJm1TGoKBBBLrBuM?usp=sharing
4. cd Downloads mv New_Rtl_Wifi ~ cd ~
5. cd New_Rtl_Wifi
6. make clean && make
7. sudo make install
8. sudo modprobe -r rtw_8723de
9. sudo modprobe rtw_8723de
10. sudo modprobe -r rtw_8723de && sleep 5 && sudo modprobe rtw_8723de ant_sel=4
11. echo "options rtw_8723de ant_sel=4" | sudo tee /etc/modprobe.d/rtw_8723de.conf

and then reboot the system and enjoy wifi.. cheers ... https://www.youtube.com/watch?v=avDof97pRis